IAEA chief Rafael Grossi told the Associated Press in an interview that most of Iran’s highly enriched uranium stockpile likely remains at the Isfahan nuclear complex.
The site was hit by US-Israeli air strikes last year and during the ongoing 2026 war, preventing IAEA inspectors from accessing the facility since June 2025.
The agency says that about 200 kilograms of uranium enriched to 60% are stored in Isfahan’s underground tunnels. In total, Iran has 440.9 kilograms of such stockpile, which is technically very close to the 90% level needed for weapons.
Satellite images show that trucks loaded with containers entered the Isfahan tunnels just before the 2025 war, and the IAEA assumes that the material is still there, but cannot verify its integrity.
Grossi stressed that Iran, as a party to the Nuclear Non-Proliferation Treaty, is obliged to open its facilities to inspections. In addition to Isfahan, the agency intends to conduct inspections at the Natanz and Fordow nuclear facilities to determine the true status of the nuclear material.
