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IAEA Reports Iran’s Near Weapons-Grade Uranium Stockpile Tops 408.6 kg, US Talks Stall

Tehran’s growing enrichment has intensified pressure on nuclear diplomacy, prompting Iran to demand binding sanctions relief before any agreement

Rafael Mariano Grossi, the director-general of the International Atomic Energy Agency, speaks to journalists attending a weeklong seminar at the agency in Vienna, Austria, Wednesday, May 28, 2025. (AP Photo/Jon Gambrell)
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A woman in a hijab walks by an anti-U.S. mural in Tehran on May 3, 2025.

Overview

  • A confidential IAEA report shows Iran’s stockpile of uranium enriched to 60% has reached 408.6 kilograms, a 133.8 kg increase since February.
  • Iran’s total enriched uranium reserves stand at 9,247.6 kg, exceeding the 2015 deal limit by more than 45 times.
  • IAEA Director General Rafael Grossi warned that Iran is the only non-nuclear-weapon state enriching to this level and criticized its cooperation over undeclared sites as less than satisfactory.
  • The United States has presented a new nuclear deal proposal after five negotiation rounds, seeking to end enrichment in exchange for sanctions relief.
  • Tehran insists on formal guarantees for sanctions removal alongside a right to continue its nuclear programme before advancing in talks.