Iran’s chief nuclear negotiator Abbas Araghchi attends a nuclear deal review meeting in Tehran.
Raheb Homavandi | Reuters
WASHINGTON – Iran will begin enriching uranium at 60%, a significant step toward weapons-grade material, in response to an attack at a key nuclear site, the country’s top nuclear negotiator told state media on Tuesday.
Iran’s deputy foreign minister, Abbas Araghchi, said he informed the International Atomic Energy Agency, which oversees the monitoring and inspection of nuclear sites, of Tehran’s decision. An estimated 90% of enriched uranium is needed to develop a bomb.
The move comes two days after Tehran said its underground Natanz atomic facility experienced a…