Director General of the International Atomic Energy Agency (IAEA), Rafael Grossi, stated on the 18th that the agency is currently unable to verify the exact location of Iran's near-weapons-grade enriched uranium stockpile.
In an interview with Bloomberg Television, he said, “I am not very certain. During wartime, all nuclear facilities are essentially shut down. Inspections cannot be carried out, and normal activities cannot proceed.”
He mentioned that Isfahan has been “repeatedly attacked, with some buildings affected.”
He noted that Iran has yet to inform the agency of any “special measures” it plans to implement to protect its stockpile from attacks.
He said, “Iran is fully aware that this stockpile must be stored under the continuous supervision of the IAEA.”
Theoretically sufficient to manufacture 10 nuclear warheads, Iran's 409 kilograms (902 pounds) of highly enriched uranium should be stored under IAEA seals in an underground facility in Isfahan. Prior to last week's Israeli attack, IAEA inspectors conducted multiple daily visits to Iranian nuclear facilities.
The IAEA continues to monitor related locations via satellite imagery, and so far, no attempts by Iran to move its highly enriched uranium stockpile have been observed.
Iran has warned that the stockpile might be relocated if Israel launches an attack. However, if Iran does this, it would constitute a serious breach of its obligations under the Nuclear Non-Proliferation Treaty (NPT).