2021 Natanz incident

The 2021 Natanz incident (Persian: حادثه ۱۴۰۰ نطنز; Hādese-ye 1400 Natanz) was an attack on the Natanz Nuclear Facility in Iran on 11 April 2021, widely attributed to the IsraeliMossad. Located in the Isfahan province of Central Iran, the facility was Iran's longtime main enrichment site. The incident involved a remotely detonated explosive device that destroyed the facility's independent power supply and caused a large-scale blackout, damaging thousands of centrifuges.

The attack occurred during a period of renewed diplomacy in Vienna aimed at reviving the Joint Comprehensive Plan of Action (JCPOA), which the United States had unilaterally withdrawn from in 2018. While intended to delay Iran's nuclear progress, the incident led Iran to restrict the access of International Atomic Energy Agency (IAEA) inspectors, and to significantly escalate its enrichment levels. These nuclear advances eventually contributed to the collapse of regional diplomacy and subsequent United States and Israeli attacks of 2025 and 2026.