Almost half of Iran's uranium, enriched to 60%, is stored in a tunnel complex in Isfahan.

This was stated by Rafael Grossi, Director General of the International Atomic Energy Agency (IAEA).

In his opinion, uranium in Isfahan is almost at a level that allows the production of nuclear weapons.

Grossi said that this tunnel complex is the only facility that was not seriously damaged by the attacks on Iran's nuclear facilities by Israel and the United States in June last year.

Diplomats have long said that Isfahan is used to store uranium enriched to up to 60%. The IAEA confirmed this in a report to member states last month, but did not specify exactly how much material is stored there.