IAEA Warns of ‘Proliferation Concerns’ as Iran’s Nuclear Sites Remain Unseen

The International Atomic Energy Agency has issued a stark warning that it cannot account for Iran’s enriched uranium inventory, nearly a year after military strikes rendered key facilities inaccessible to inspectors. In a confidential report circulated to member states and seen by news agencies, the watchdog declares it is “unable to provide any information on the current size, composition or whereabouts of the stockpile of enriched uranium in Iran or whether Iran has suspended all enrichment-related activities.” The report, to be debated by the IAEA Board of Governors next week in Vienna, calls the prolonged verification gap “a matter of concern with respect to proliferation” and urges Tehran to engage constructively without delay.

The inspection blackout dates from the war Israel launched against Iran in June 2025, in which the United States participated by striking three major nuclear sites. Those facilities, along with others, came under renewed attack from late February this year. While the IAEA acknowledges that the military operations have created “an unprecedented situation,” it insists that resuming verification activities inside Iran is “of the utmost importance.” The only site that has remained accessible is the Bushehr nuclear power plant. Before the 2025 conflict, the agency’s estimates suggested Iran held roughly 440 kilogrammes of uranium enriched to 60 percent purity, perilously close to the 90 percent threshold needed for a nuclear weapon.

Viewed from Washington, the report complicates an already fraught diplomatic landscape. President Donald Trump has declared he “doesn’t need agreements,” even as IAEA Director‑General Rafael Grossi voices full support for the ongoing negotiations between the US and Iran. From Tehran, the report amplifies pressure to provide the access that is critical to demonstrating peaceful intent. European and Gulf capitals, meanwhile, see a dangerous erosion of the non‑proliferation regime. Arab media have highlighted how Israel’s strikes precipitated the verification crisis, shifting culpability beyond Iran’s own opacity.

Going forward, the IAEA’s inability to discharge its safeguards responsibilities under the Non‑Proliferation Treaty leaves a vacuum that both alarms and invites miscalculation. If diplomatic outreach fails to restore inspectors’ access, the risk grows that Iran’s enrichment trajectory might be assessed solely through national intelligence, raising the spectre of a wider military confrontation. With Israel’s red lines clearly drawn and the Trump administration’s maximum‑pressure campaign in full effect, the coming weeks in Vienna will test whether diplomacy can still bridge a gap that is measured in kilograms of near‑weapons‑grade material.