UN Nuclear Agency Believes Iran Holds Highly Enriched Uranium at Isfahan Complex

The International Atomic Energy Agency (IAEA) has indicated that the majority of Iran's highly enriched uranium is believed to be located at the Isfahan nuclear complex. IAEA Director General Rafael Grossi revealed in an interview that satellite imagery suggests a significant presence of this material at the site. Reports indicate that around 200 kilograms of uranium enriched to 60% purity are stored in tunnels at Isfahan, just a short technical step away from weapons-grade enrichment levels of 90%.

The concerns regarding Iran's nuclear capabilities have intensified, especially after the complex was targeted during military strikes involving the U.S. and Israel in June 2025. During these attacks, IAEA inspections were halted, raising the stakes in an already tenuous geopolitical landscape. Grossi confirmed that the agency has been unable to inspect the tunnels or verify the status of the uranium since the escalation of hostilities.

Satellite images captured around the time of the military strikes showed a truck entering the underground facility, believed to be carrying containers of highly enriched uranium. This evidence contributes to suspicions that Iran may have transferred all of its enriched inventory to Isfahan prior to the strikes.

Iran maintains that its nuclear program is for peaceful purposes; however, analysts warn that the accumulation of enriched uranium poses a critical proliferation risk. The IAEA has called on Iran to comply with its obligations under the Nuclear Nonproliferation Treaty (NPT), which includes allowing inspections of its nuclear facilities.

As discussions surrounding Iran's nuclear ambitions continue, the IAEA and international stakeholders are pressing for transparency and adherence to agreements that seek to curtail the development of nuclear weapons capabilities in the region. The situation remains closely monitored as geopolitical tensions and negotiations evolve.