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A mass stabbing is a single incident in which multiple victims are harmed or killed in a knife-enabled crime. In such attacks, sharp objects are thrust at the victim, piercing through the
skin Skin is the layer of usually soft, flexible outer tissue covering the body of a vertebrate animal, with three main functions: protection, regulation, and sensation. Other animal coverings, such as the arthropod exoskeleton, have different d ...
and harming the victim. Examples of sharp instruments used in mass stabbings may include
kitchen knives A kitchen knife is any knife that is intended to be used in food preparation. While much of this work can be accomplished with a few general-purpose knives – notably a large chef's knife, a toughness, tough cleaver, a small #Paring, paring knif ...
, utility knives, sheath knives,
scissors Scissors are hand-operated shearing tools. A pair of scissors consists of a pair of metal blades pivoted so that the sharpened edges slide against each other when the handles (bows) opposite to the pivot are closed. Scissors are used for cutt ...
, Katanas,
hammers A hammer is a tool, most often a hand tool, consisting of a weighted "head" fixed to a long handle that is swung to deliver an impact to a small area of an object. This can be, for example, to drive nails into wood, to shape metal (as ...
,
screwdriver A screwdriver is a tool, manual or powered, used for turning screws. A typical simple screwdriver has a handle and a shaft, ending in a tip the user puts into the screw head before turning the handle. This form of the screwdriver has been repla ...
s, icepicks,
bayonet A bayonet (from French ) is a knife, dagger, sword, or spike-shaped weapon designed to fit on the end of the muzzle of a rifle, musket or similar firearm, allowing it to be used as a spear-like weapon.Brayley, Martin, ''Bayonets: An Illustra ...
s,
axe An axe ( sometimes ax in American English; see spelling differences) is an implement that has been used for millennia to shape, split and cut wood, to harvest timber, as a weapon, and as a ceremonial or heraldic symbol. The axe has man ...
s,
machete Older machete from Latin America Gerber machete/saw combo Agustín Cruz Tinoco of San Agustín de las Juntas, Oaxaca">San_Agustín_de_las_Juntas.html" ;"title="Agustín Cruz Tinoco of San Agustín de las Juntas">Agustín Cruz Tinoco of San ...
s and glass bottles. Knife crime poses security threats to many countries around the world. There are many different factors causing mass stabbing. This may include
social inequality Social inequality occurs when resources in a given society are distributed unevenly, typically through norms of allocation, that engender specific patterns along lines of socially defined categories of persons. It posses and creates gender c ...
, abuse of
alcohol Alcohol most commonly refers to: * Alcohol (chemistry), an organic compound in which a hydroxyl group is bound to a carbon atom * Alcohol (drug), an intoxicant found in alcoholic drinks Alcohol may also refer to: Chemicals * Ethanol, one of se ...
and
drug A drug is any chemical substance that causes a change in an organism's physiology or psychology when consumed. Drugs are typically distinguished from food and substances that provide nutritional support. Consumption of drugs can be via inhalati ...
s, easy access to
weapon A weapon, arm or armament is any implement or device that can be used to deter, threaten, inflict physical damage, harm, or kill. Weapons are used to increase the efficacy and efficiency of activities such as hunting, crime, law enforcement, ...
s, social and cultural norms, religious and political reasons, among others. Many actions have been taken to address mass stabbing and knife crimes. This may include enacting new legislation, social and education programs, medical interventions, among others. However, mass stabbing and similar
terrorist Terrorism, in its broadest sense, is the use of criminal violence to provoke a state of terror or fear, mostly with the intention to achieve political or religious aims. The term is used in this regard primarily to refer to intentional violen ...
attacks carried out by Islamic extremists have resulted in the rise of
Islamophobia Islamophobia is the fear of, hatred of, or prejudice against the religion of Islam or Muslims in general, especially when seen as a geopolitical force or a source of terrorism. The scope and precise definition of the term ''Islamophobia' ...
.


Definition

A mass stabbing can be defined from a number of different perspectives. The Oxford English Dictionary defines the verb ‘
stab STAB or stab may refer to: * Stabbing, penetration or contact with a sharp object * Stab, Kentucky, US * Stab (b-boy move), a breakdance technique *Stab (music), an element in musical composition *Stab (Luftwaffe designation), during World War II, ...
’ as an action that propels a pointed weapon with the intention of harm or murder. A mass stabbing is an incident involving the use of pointed weapons to wound or kill multiple people. Mass stabbings can be looked at from the scope of knife crime. Based on a publication by the
Parliament of the United Kingdom The Parliament of the United Kingdom is the Parliamentary sovereignty in the United Kingdom, supreme Legislature, legislative body of the United Kingdom, the Crown Dependencies and the British Overseas Territories. It meets at the Palace of We ...
, ‘knife-enabled crime’ is an incident where harm is threatened or caused with the use of bladed weapons. The media also refers to ‘knife crime’ as a
stabbing A stabbing is penetration or rough contact with a sharp or pointed object at close range. ''Stab'' connotes purposeful action, as by an assassin or murderer, but it is also possible to accidentally stab oneself or others. Stabbing differs fro ...
incident or the illegal possession of knives by a person in the public. From a legal perspective, the phrase ''
mass killing Mass killing is a concept which has been proposed by genocide scholars who wish to define incidents of non-combat killing which are perpetrated by a government or a state. A mass killing is commonly defined as the killing of group members withou ...
'' can be used to define a mass stabbing. Based on section 2 of the Investigative Assistance for Violent Crimes Act of 2012 of the
United States of America The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...
, which was signed into law and published by the
US Congress The United States Congress is the legislature of the federal government of the United States. It is bicameral, composed of a lower body, the House of Representatives, and an upper body, the Senate. It meets in the U.S. Capitol in Washing ...
on 13 January 2013, ‘mass killing’ is an individual occasion with three or more people murdered.Mass stabbings can also be looked at from the perspective of
mass murder Mass murder is the act of murdering a number of people, typically simultaneously or over a relatively short period of time and in close geographic proximity. The United States Congress defines mass killings as the killings of three or more pe ...
. The
Federal Bureau of Investigation The Federal Bureau of Investigation (FBI) is the domestic intelligence and security service of the United States and its principal federal law enforcement agency. Operating under the jurisdiction of the United States Department of Justice, t ...
(FBI) of the United States of America has defined mass murder as an incident where four or more people are killed in a single incident on a continuing basis without any significant time period in between each of the murders.


Causes

A World Health Organisation (WHO) report states that past victimisation is one of the risk factors causing violence. Children and young people with adverse experience are particularly prone to being perpetrators or victims of violence. Abuse of alcohol is another risk factor that cause people, particularly young people to involve in violence such as knife crime. Research by WHO found that the incidence of violence was higher in countries with greater ease of access to alcohol. Similarly,
drug abuse Substance abuse, also known as drug abuse, is the use of a drug in amounts or by methods which are harmful to the individual or others. It is a form of substance-related disorder. Differing definitions of drug abuse are used in public health, ...
is another possible cause of knife crime. Illicit drug trade has been linked to the increasing incidence of knife crime. Examples of drugs that are particularly linked to acts of violence include
tobacco Tobacco is the common name of several plants in the genus '' Nicotiana'' of the family Solanaceae, and the general term for any product prepared from the cured leaves of these plants. More than 70 species of tobacco are known, but the c ...
,
cocaine Cocaine (from , from , ultimately from Quechua: ''kúka'') is a central nervous system (CNS) stimulant mainly used recreationally for its euphoric effects. It is primarily obtained from the leaves of two Coca species native to South Ame ...
and
amphetamine Amphetamine (contracted from alpha- methylphenethylamine) is a strong central nervous system (CNS) stimulant that is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity. It is also commonly used a ...
s. WHO has also stated that there is a strong correlation between violence and social inequality and deprivation. The larger the differences in income between the high-income group and the low-income group, the higher the incidence of
homicide Homicide occurs when a person kills another person. A homicide requires only a volitional act or omission that causes the death of another, and thus a homicide may result from accidental, reckless, or negligent acts even if there is no inten ...
s. Another factor that may have led to knife crimes and violence among young people is the social and cultural norms in the environment they are exposed to. This may be due to the exposure of young people to violent behaviour of family members, friends or other members of society, which lead them to think that acts of violence are normal and acceptable. This group of people may have been exposed to various contents containing different forms of violence in the
mass media Mass media refers to a diverse array of media technologies that reach a large audience via mass communication. The technologies through which this communication takes place include a variety of outlets. Broadcast media transmit information ...
which may have affected the behaviour of the young people. Spreading of religious extremism by terrorist groups, such as
al-Qaeda Al-Qaeda (; , ) is an Islamic extremist organization composed of Salafist jihadists. Its members are mostly composed of Arabs, but also include other peoples. Al-Qaeda has mounted attacks on civilian and military targets in various countr ...
and Islamic State of Iraq and the Levant (IS), may be another cause of mass stabbings. Both terrorist groups used publications such as '' Dabiq'' of IS and ''
Inspire The following is a thematic list of European Union directives: For a date based list, see the :European Union directives by number Numbering From 1 January 1992 to 31 December 2014, numbers assigned by the General Secretariat of the Council ...
'' of al-Qaeda to propagate the ideologies of the organisations and demonize their opponents, particularly the western
democracy Democracy (From grc, δημοκρατία, dēmokratía, ''dēmos'' 'people' and ''kratos'' 'rule') is a form of government in which the people have the authority to deliberate and decide legislation (" direct democracy"), or to choose go ...
and their values. The terrorist organisations have encouraged their followers to launch attacks with knives because it is a cheap and easy method which is difficult to be detected by authorities yet capable of causing great harm to the general public. Political reasons may be another cause of mass stabbings. Various studies have been conducted by scholars and researchers to examine the relationship between
political repression Political repression is the act of a state entity controlling a citizenry by force for political reasons, particularly for the purpose of restricting or preventing the citizenry's ability to take part in the political life of a society, thereb ...
and
terrorism Terrorism, in its broadest sense, is the use of criminal violence to provoke a state of terror or fear, mostly with the intention to achieve political or religious aims. The term is used in this regard primarily to refer to intentional violen ...
. In general, there is a lack of consensus on the relationship between repression and violence. Some studies argued that political repression may turn non-violent groups to acts of violence. However, another study showed that there was a positive correlation between repression and violence in the short-run, but the correlation turns negative in the long-run.


Reactions to mass stabbings


Government and law enforcement

The
Government of the United Kingdom ga, Rialtas a Shoilse gd, Riaghaltas a Mhòrachd , image = HM Government logo.svg , image_size = 220px , image2 = Royal Coat of Arms of the United Kingdom (HM Government).svg , image_size2 = 180px , caption = Royal Arms , date_es ...
has announced on 31 January 2019 that they will introduce the Knife Crime Prevention Orders through an amendment to the Offensive Weapons Bill in conjunction with the government's effort in tackling knife crime. The new preventative order can be placed on any person aged 12 or over, where curfews, geographical restrictions and
social media Social media are interactive media technologies that facilitate the creation and sharing of information, ideas, interests, and other forms of expression through virtual communities and networks. While challenges to the definition of ''social me ...
restrictions may be imposed on the targets of the police. Retailers are also forbidden from selling knives to any person aged 18 or below. The law is aimed at reducing knife crimes especially among young people. Criminal prosecution, fines or jail sentences may be applied on any person who breaches the law. Pressure from the public and changes in laws have also mandated tougher sentences from the judiciary on knife crime offences.
England England is a Countries of the United Kingdom, country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separa ...
and
Wales Wales ( cy, Cymru ) is a country that is part of the United Kingdom. It is bordered by England to the east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in ...
saw 85% of their knife crime offenders jailed for at least three months. The average jail sentence for these offenders was eight months in 2018, an increment of three months from the average a decade ago. In
Scotland Scotland (, ) is a Countries of the United Kingdom, country that is part of the United Kingdom. Covering the northern third of the island of Great Britain, mainland Scotland has a Anglo-Scottish border, border with England to the southeast ...
, there was a threefold increase in average sentence for carrying a knife in 2015 when compared to the data from 10 years ago. Members of the law enforcement community has also lobbied the government for extra funding to tackle crimes. The Government of the United Kingdom has also announced extra funding of £100m to security forces in England and Wales to tackle crimes, specifically knife crimes. Countries like
Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...
and
Australia Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. With an area of , Australia is the largest country b ...
have also introduced laws to restrict the sale of alcohol at specific times of a day. Studies in Diadema, Brazil has shown that homicides were reduced by 44% in the course of three years with the introduction of a law that restricts trading hours for alcoholic products.


Schools

Schools have also taken precautionary measure to prevent knife crime in school compounds. A WHO report states that creating safe learning environment in schools is critical in preventing violence and knife crime among young people. A direct approach taken by some schools in the United States of America was installing weapon detection systems in schools. This is to prevent weapons such as guns and knives from being brought into schools and threaten the safety of the community. Another initiative taken by some schools is the introduction of bully-prevention programs in schools. An example of such programs is the Olweus Program, which is originated from
Norway Norway, officially the Kingdom of Norway, is a Nordic country in Northern Europe, the mainland territory of which comprises the western and northernmost portion of the Scandinavian Peninsula. The remote Arctic island of Jan Mayen and th ...
and is currently implemented in Australia,
Lithuania Lithuania (; lt, Lietuva ), officially the Republic of Lithuania ( lt, Lietuvos Respublika, links=no ), is a country in the Baltic region of Europe. It is one of three Baltic states and lies on the eastern shore of the Baltic Sea. Lithuania ...
, the
Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Neth ...
, the United Kingdom and the United States of America. The KiVa program in
Finland Finland ( fi, Suomi ; sv, Finland ), officially the Republic of Finland (; ), is a Nordic country in Northern Europe. It shares land borders with Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bot ...
is another successful anti-bullying program in
Europe Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a Continent#Subcontinents, subcontinent of Eurasia ...
. Education programs aimed at reducing knife crime has also been introduced. For example, the Be Safe Project in the United Kingdom educates students about the legal, social and health implications of knife crime.


Others

In Scotland, knife crime is treated as a
public health Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". Analyzing the det ...
issue and a public funded initiative was launched to address the root cause of knife crimes. The initiative is participated by law enforcement agencies like the police, social services and other organisations. For example, No Knives, Better Lives, an organisation launched in 2009, works with the Scottish police, schools and volunteers to raise awareness among young people on knife crime prevention. Gang members were also invited to a meeting with the police, health professionals, victims and social service workers where they discussed the implications of knife crime and violence. They were offered with assistance in employment, housing and education to help them depart from violence and knife crime. Parenting programs were launched in many countries around the world to improve parenting skills. WHO has stated that interventions in parenting skills can be beneficial to parent-children relationship and prevent violence amongst young people. Examples of parenting programs includes Nurse-Family Partnership, Triple P and The Incredible Years.


Rise of Islamophobia

Some scholars and experts believe that knife crime, mass stabbing and terrorist attacks have caused a surge in Islamophobia. Based on a report by
Tell Mama Tell MAMA (Measuring Anti-Muslim Attacks) is a national project which records and measures anti-Muslim incidents in the United Kingdom. It is modelled on the Jewish Community Security Trust (CST) and like the CST it also provides support for v ...
, there was a 26% increase in anti-Muslim attacks in the United Kingdom from 2017 to 2018. Some experts have attributed the backlash against the
Islam Islam (; ar, ۘالِإسلَام, , ) is an Abrahamic monotheistic religion centred primarily around the Quran, a religious text considered by Muslims to be the direct word of God (or '' Allah'') as it was revealed to Muhammad, the ...
ic religion and
Muslims Muslims ( ar, المسلمون, , ) are people who adhere to Islam, a monotheistic religion belonging to the Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God of Abraha ...
to the terrorist attacks in the United Kingdom which were carried out by Muslims. Example of terrorist attacks in the United Kingdom include
Manchester Arena Bombing On 22 May 2017, an Islamist extremist suicide bomber detonated a shrapnel-laden homemade bomb as people were leaving the Manchester Arena following a concert by American pop singer Ariana Grande. Twenty-three people were killed, inclu ...
, London Bridge attack and Westminster attack. All of the attacks happened in the United Kingdom in 2017. Another research from California State University, San Bernardino, has found that there was a 78% rise in
hate crime A hate crime (also known as a bias-motivated crime or bias crime) is a prejudice-motivated crime which occurs when a perpetrator targets a victim because of their membership (or perceived membership) of a certain social group or racial demograph ...
s against Muslims in the United States of America in 2015. Police reports in 2016 also stated that hate crimes and violence against Muslim communities in the United States of America were on the rise.


Examples of mass stabbing cases


2014 Kunming attack

On March 1, 2014, a group of eight male and female attackers wielding knives attacked a
railway station Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in Track (rail transport), tracks. In contrast to road transport, where the ...
at
Kunming Kunming (; ), also known as Yunnan-Fu, is the capital and largest city of Yunnan province, China. It is the political, economic, communications and cultural centre of the province as well as the seat of the provincial government. The headqu ...
, the provincial capital of
Yunnan Yunnan , () is a landlocked province in the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is Kunming. The province borders the ...
, in the southwest of
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's List of countries and dependencies by population, most populous country, with a Population of China, population exceeding 1.4 billion, slig ...
. 31 people were killed and a further 141 were wounded from the knife attack at the crowded railway station. The attackers were reported to be wearing similar black clothing during the attack. Cleavers, daggers and other knives were among the weapons used by the perpetrators of the attack. Four attackers were shot dead by security forces, and the remaining four assailants, including a woman, were arrested. All of the male attackers were executed in 2015, and the woman was sentenced to life imprisonment. Authorities and the official news service of China,
Xinhua Xinhua News Agency (English pronunciation: )J. C. Wells: Longman Pronunciation Dictionary, 3rd ed., for both British and American English, or New China News Agency, is the official state news agency of the People's Republic of China. Xinhua ...
, said that the knife attack was an act of terrorism carried out by Uighur separatists from
Xinjiang Xinjiang, SASM/GNC: ''Xinjang''; zh, c=, p=Xīnjiāng; formerly romanized as Sinkiang (, ), officially the Xinjiang Uygur Autonomous Region (XUAR), is an autonomous region of the People's Republic of China (PRC), located in the northwes ...
, a province at the far west of China. The attack follows an attack at
Tiananmen Square Tiananmen Square or Tian'anmen Square (; 天安门广场; Pinyin: ''Tiān'ānmén Guǎngchǎng''; Wade–Giles: ''Tʻien1-an1-mên2 Kuang3-chʻang3'') is a city square in the city center of Beijing, China, named after the eponymous Tiananmen ...
in Beijing in October 2013 which was also blamed on the Uighur separatists by the central government of China. Muslim
Uighurs The Uyghurs; ; ; ; zh, s=, t=, p=Wéiwú'ěr, IPA: ( ), alternatively spelled Uighurs, Uygurs or Uigurs, are a Turkic ethnic group originating from and culturally affiliated with the general region of Central and East Asia. The Uyghu ...
are a minority ethnic group concentrated in Xinjiang, China, many of whom accuse the central government of institutionalised repression against them. They also argue that
Han Chinese The Han Chinese () or Han people (), are an East Asian ethnic group native to China. They constitute the world's largest ethnic group, making up about 18% of the global population and consisting of various subgroups speaking distinctive ...
immigrants from other regions of China have deprived Uighurs of jobs, resources, and opportunities in their homeland. There is a
resistance movement A resistance movement is an organized effort by some portion of the civil population of a country to withstand the legally established government or an occupying power and to disrupt civil order and stability. It may seek to achieve its objective ...
of Uighurs against the central government at Xinjiang. The incident is now known as '3-01' in China. It was also called "China's
9-11 The September 11 attacks, commonly known as 9/11, were four coordinated Suicide attack, suicide List of terrorist incidents, terrorist attacks carried out by al-Qaeda against the United States on Tuesday, September 11, 2001. That morning, ...
" by the ''Global Times'', a state-run media in China. Authorities increased security in the Xinjiang region following the attack.


2016 Sagamihara knife attack

At 2:20 am on 26 July 2016, a man launched a knife attack at a center for the disabled people at
Sagamihara is a Cities of Japan, city in Kanagawa Prefecture, Japan. , the city has an estimated population of 723,470, with 334,812 households, and a population density of 1,220 persons per km2. The total area of the city is . Sagamihara is the third-m ...
, a town west of
Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and List of cities in Japan, largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, ...
,
Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
. During the knife attack, 19 residents of the care center were killed, including nine men and ten women. An additional 26 people were wounded during the incident. The suspect, Satoshi Uematsu, was a former employee of the care center. He surrendered himself at a police station near the site of the attack shortly after the attack. According to NHK, Satoshi Uematsu has delivered a handwritten letter to a Japanese politician where he threatened to kill 470 severely disabled people. He also advocated for legislation that would allow the disabled people to be euthanized with consents from their family members. He was hospitalized but was subsequently released after two weeks. Charged with murder, the trial against Satoshi Uematsu ended in March 2020. Uematsu was sentenced to death. The care center is set to be demolished by local authorities at
Kanagawa Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Kanagawa Prefecture is the second-most populous prefecture of Japan at 9,221,129 (1 April 2022) and third-densest at . Its geographic area of makes it fifth-smallest. Kanaga ...
and new care homes will be constructed. The Sagamihara attack was the worst mass killing case in Japan in decades. Officials have ruled out the involvement of terrorism in the incident. The incident sent a shocking wave across all of Japan, a country with one of the lowest crime rates in the world.


2017 London Bridge attack

On 3 June 2017, three men launched an attack in central
London London is the capital and List of urban areas in the United Kingdom, largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary dow ...
shortly before 10 pm. A vehicle was driven into pedestrians on
London Bridge Several bridges named London Bridge have spanned the River Thames between the City of London and Southwark, in central London. The current crossing, which opened to traffic in 1973, is a box girder bridge built from concrete and steel. It rep ...
before crashing near Barrowboy and Banker pub. The attackers subsequently attacked people around the nearby
Borough Market Borough Market is a wholesale and retail market hall in Southwark, London, England. It is one of the largest and oldest food markets in London, with a market on the site dating back to at least the 12th century. The present buildings were bu ...
. Eight victims were killed and a further 48 people were injured. Five members of the police force were also injured during the incident. The attackers were Khuram Shazad Butt, Rachid Redouane, and Youssef Zaghba. All of them were shot dead by armed police near Wheatsheaf pub. A total of 46 gunshots was fired during the police operation. The attack lasted for less than 10 minutes. The IS terrorist group claimed responsibility for the attack on the following day. Investigations revealed that the attackers had bought their weapons, which were pink ceramic knives costing £4 each. A court hearing in London revealed that the attackers had taken a large quantities of
steroid A steroid is a biologically active organic compound with four rings arranged in a specific molecular configuration. Steroids have two principal biological functions: as important components of cell membranes that alter membrane fluidity; and ...
s before launching the attack in London. The steroid was named as
dehydroepiandrosterone Dehydroepiandrosterone (DHEA), also known as androstenolone, is an endogenous steroid hormone precursor. It is one of the most abundant circulating steroids in humans. DHEA is produced in the adrenal glands, the gonads, and the brain. It functi ...
. The attack came three months after an attacker rammed a vehicle into pedestrians on
Westminster Bridge Westminster Bridge is a road-and-foot-traffic bridge over the River Thames in London, linking Westminster on the west side and Lambeth on the east side. The bridge is painted predominantly green, the same colour as the leather seats in the H ...
in March 2017. Four people were killed and 50 others were injured in this incident. A police officer who was on duty at the nearby
Palace of Westminster The Palace of Westminster serves as the meeting place for both the House of Commons and the House of Lords, the two houses of the Parliament of the United Kingdom. Informally known as the Houses of Parliament, the Palace lies on the north ban ...
, the site of the Parliament of the United Kingdom, was fatally stabbed by the knife-wielding attacker. The perpetrator was shot dead near the Parliament by the police. Data from the Home Office of the United Kingdom showed that the incidence of knife crime has been on the rise in England and Wales since 2014. Knives are mostly used in assault and robbery in England and Wales in the year ending September 2018. The incidence of homicides using knives in 2017-2018 was the highest since 1946 based on another set of data released by the Home Office. While
Prime Minister A prime minister, premier or chief of cabinet is the head of the cabinet and the leader of the ministers in the executive branch of government, often in a parliamentary or semi-presidential system. Under those systems, a prime minister is ...
Theresa May Theresa Mary May, Lady May (; née Brasier; born 1 October 1956) is a British politician who served as Prime Minister of the United Kingdom and Leader of the Conservative Party from 2016 to 2019. She previously served in David Cameron's c ...
has dismissed the correlation between the police numbers and rise of knife crimes, the Home Office Committee has said that the fall of staff numbers in security forces have pose difficulties to the police in coping with crimes and violence.


2022 Saskatchewan stabbings

On September 4, 2022, 29 people were stabbed, 11 of whom were killed, in at least thirteen locations in the James Smith Cree Nation and Weldon,
Saskatchewan Saskatchewan ( ; ) is a province in western Canada, bordered on the west by Alberta, on the north by the Northwest Territories, on the east by Manitoba, to the northeast by Nunavut, and on the south by the U.S. states of Montana and North Da ...
,
Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world ...
. Alerts relating to the incidents were extended to
Manitoba , image_map = Manitoba in Canada 2.svg , map_alt = Map showing Manitoba's location in the centre of Southern Canada , Label_map = yes , coordinates = , capital = Winn ...
and
Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest Terr ...
. Some of the victims were believed to have been targeted, while others were randomly attacked. On September 7, 2022, the suspect Myles Sanderson was found and arrested near Rosthern, Saskatchewan. Shortly after being taken into custody, Myles Sanderson died of "self inflicted injuries".


2022 University of Idaho stabbings

In the 2022 University of Idaho killings, in the early morning hours of November 13, 2022, a
mass murder Mass murder is the act of murdering a number of people, typically simultaneously or over a relatively short period of time and in close geographic proximity. The United States Congress defines mass killings as the killings of three or more pe ...
took place in
Moscow, Idaho Moscow ( ) is a city in North Central Idaho, United States. Located along the state border with Washington, it had a population of 25,435 at the 2020 census. The county seat and largest city of Latah County, Moscow is the home of the Univer ...
, in which four
University of Idaho The University of Idaho (U of I, or UIdaho) is a public land-grant research university in Moscow, Idaho. It is the state's land-grant and primary research university,, and the lead university in the Idaho Space Grant Consortium. The University ...
students were stabbed to death in an off-campus rented home by one or more attackers using one or more long knives.


References

{{Mass stabbings in the 2020s Violence Mass murder