UN Places Arms Embargo, Sanctions on Iran Over Its Nuclear Program

Iran has vowed a harsh response to the reimposition of sanctions.

Members of the United Nations Security Council vote on a resolution by Russia and China to delay by six months the reimposition of sanctions on Iran during the 80th U.N. General Assembly in New York City on Sept. 26, 2025. Eduardo Munoz/Reuters

The United Nations on Sept. 27 reinstated an arms embargo and other sanctions on Iran after its nuclear program triggered a process in which European powers warned Tehran it would receive a harsh response.

The return of sanctions on Iran was initiated by Britain, France, and Germany at the U.N. Security Council, following accusations that the Middle East nation violated a 2015 agreement intended to prevent it from building a nuclear warhead. Tehran has denied pursuing nuclear bombs.