The board of governors of the International Atomic Energy Agency voted Wednesday to report Iran to the UN Security Council, marking the first such referral in two decades.

The 35-member board adopted a resolution citing Iran's failure to cooperate with inspectors in a long-running investigation into uranium traces found at undeclared sites. Western officials have linked those traces to suspicions of a secret nuclear weapons program that Iran maintained until at least 2003. Iran maintains that its nuclear activities remain entirely peaceful.

The measure passed with 23 votes in favor. Russia, China, and Niger voted against it, while eight countries abstained. The United States, Britain, France, and Germany sponsored the resolution.

This action follows a June 2025 board finding that Iran was in noncompliance with its nonproliferation obligations due to lack of cooperation. The new referral opens the door to potential Security Council sanctions, though analysts note that veto power held by Russia and China makes meaningful penalties unlikely.

The vote comes amid ongoing concerns over Iran's enriched uranium stockpile. The IAEA has reported that Iran held approximately 440.9 kilograms of uranium enriched to 60 percent purity before Israeli and U.S. strikes on Iranian nuclear facilities in June 2025. That amount is enough material, if further enriched, for roughly 10 nuclear weapons according to IAEA estimates.

Inspectors have been unable to verify the status of Iran's nuclear material and facilities since the attacks, raising proliferation concerns. IAEA Director General Rafael Grossi has described the loss of continuity of knowledge as a serious matter requiring urgent remedy.

The diplomatic step reflects continued Western pressure on Tehran despite limited prospects for enforcement at the Security Council level.