Pakistan, Jan. 21 -- The IAEA chief, Rafael Grossi, has warned Iran to account for missing enriched uranium at bombed sites. He urged Tehran to submit a detailed report and allow inspections at Natanz, Fordow, and Isfahan. Grossi emphasized that the standoff over nuclear verification cannot continue indefinitely.

The UN nuclear watchdog has inspected 13 declared Iranian nuclear facilities that were not damaged. However, it cannot verify three key sites attacked last June by the United States and Israel. Iran must clarify the status of 440.9 kg of uranium enriched up to 60%, close to weapons-grade levels.

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Grossi said this uranium could theoretically produce around 10 nuclear b...