Iran’s Nuclear Programme: IAEA Raises Concerns over Uninspected Isfahan Facility

The International Atomic Energy Agency (IAEA) has expressed “growing concern” over an underground uranium enrichment facility in Isfahan that Iran announced last year but has yet to open to the agency’s inspectors. The concerns were outlined in a confidential report on Iran, details of which were made public on Friday.

In its quarterly report to member states, the agency said of the Isfahan Fuel Enrichment Plant: “The agency does not know the facility’s precise location, its status for safeguards purposes, or whether it contains nuclear material.”

According to the report, the lack of information about Iran’s enriched uranium and the agency’s inability to access nuclear facilities since the June 2025 attacks raise serious nuclear proliferation concerns.

The report added that the IAEA had received no information from Iran about the status of its nuclear facilities and material, nor had it been granted access to them, with the exception of the Bushehr nuclear power plant.

The agency voiced growing concern over Iran’s refusal to allow it to verify design information or conduct inspections at the Isfahan uranium enrichment facility, which Tehran announced in June 2025.

The report reiterated that the IAEA does not know the facility’s precise location or whether it contains nuclear material, stressing that verification activities in Iran must resume without further delay.