The International Atomic Energy Agency’s 35-nation Board of Governors referred Iran to the UN Security Council for the first time in 20 years, citing Tehran’s failure to cooperate with a long-running investigation into uranium traces found at undeclared sites. The resolution, proposed by the United States, Britain, France and Germany, passed with 23 votes in favor, three against, eight abstentions and one country not voting because it was in arrears. Russia, China and Niger opposed the measure. The referral exposes Iran to possible sanctions and asset freezes, although punitive Security Council action is unlikely because Russia and China hold veto power. The move follows the board’s June 2025 finding that Iran was in non-compliance with its non-proliferation obligations. Since Israeli and U.S. strikes on Iranian nuclear sites during a 12-day war in June 2025, Iran has denied IAEA inspectors access to affected facilities, and the agency has been unable to verify Iran’s stockpile of 440.9 kilograms of uranium enriched to up to 60%. Iran says its nuclear program is peaceful, while Western officials suspect the unexplained traces could point to a secret weapons program that lasted until 2003. The referral comes as U.S.-Iran hostilities intensify, with the United States destroying five Iranian oil tankers and Iran striking American targets in Jordan this week.