A confidential report by the International Atomic Energy Agency (IAEA), seen by Reuters on Wednesday, revealed that Iran’s stockpile of uranium enriched up to 60 percent purity, close to weapons-grade, had slightly increased before Israel’s attack on its nuclear facilities on June 13.

The report stated this was an increase of 32.3 kilograms compared to the assessment issued in May 2025.

It noted that as of June 13, Iran’s stockpile of uranium hexafluoride enriched up to 60 percent, which can be further enriched in centrifuges, reached 440.9 kilograms by June 13, 2025.

The report explained that this amount is sufficient to make 10 nuclear bombs if enrichment levels are increased.

These figures appeared before the Israeli military strike on Iran on June 13, 2025, targeting nuclear sites such as Natanz and Fordow.

Following the attack, IAEA inspections in Iran stopped due to damage to the facilities, and inspectors were unable to conduct on-site verification of Iran’s current stockpile data.

On Wednesday, the IAEA expressed regret over Tehran’s decision to suspend cooperation following the war between Iran and Israel and urged the swift resumption of inspections.

The UN agency said in a non-public report seen by AFP, “The withdrawal of all agency inspectors from Iran due to safety concerns arising from military attacks on Iranian nuclear facilities was necessary given the overall security situation,” adding that “Iran’s subsequent decision to suspend cooperation with the agency is very regrettable.”