Iran continues to restrict access to its nuclear facilities for inspectors from the International Atomic Energy Agency (IAEA), leaving the agency unable to verify the whereabouts and status of the country’s enriched uranium stockpiles, according to an internal report by IAEA Director General Rafael M. Grossi. The report, dated Tuesday and circulated to member states ahead of a planned meeting of the agency’s board of governors in Vienna, highlights ongoing proliferation concerns amid limited transparency from Tehran.
The 11-page document expresses concern over Iran’s refusal to grant IAEA personnel entry to key nuclear sites, including the critical enrichment plants at Fordow, Natanz, and Isfahan. The report notes that the agency has had no access to these facilities since June 2025, shortly after a 12-day bombing campaign by Israel and the United States targeting Iran’s nuclear infrastructure. The airstrikes reportedly disrupted some of Iran’s known nuclear sites and affected its uranium stockpiles.
According to information provided by Iran before June 12, which the IAEA has largely verified in the past, the country possessed approximately 9,875 kilograms of enriched uranium. Of that total, 184.1 kilograms were enriched up to 20 percent, while 440.9 kilograms were enriched to nearly 60 percent—levels approaching weapons-grade material. However, the agency currently cannot confirm the present size, composition, or location of Iran’s enriched uranium stockpile, nor whether Iran has suspended enrichment activities.
The report also states the agency lacks information on Iran’s present centrifuge inventory or whether centrifuge production and testing are ongoing. Additionally, Iran has denied access to a newer enrichment site near Isfahan, which it announced in June 2025. The IAEA remains uncertain about the facility’s precise location or its operational status.
Longstanding concerns persist regarding Iran’s nuclear past and undeclared facilities that may have had military purposes. While Iran denies all intentions to develop nuclear weapons, it has yet to provide a satisfactory explanation for its enrichment of uranium to 60 percent, far beyond the threshold needed for civilian applications.
The IAEA report underscores Grossi’s urgent call for Iran to allow prompt and unrestricted access to its nuclear sites to enable effective monitoring. Iran has offered to permit inspections at its Bushehr nuclear power plant, a civilian facility, later this month.
The report emerges amid heightened tensions between the United States and Iran, following an intermittent exchange of hostilities after the bombing campaign initiated on February 28 by Israel and the United States. An interim agreement reached in June, intended to facilitate agency access and revive nuclear negotiations, quickly collapsed after fewer than two weeks.
The forthcoming IAEA board meeting is expected to consider a resolution censuring Iran for its noncompliance with transparency obligations and restrictions on inspector access.