U.S. Secretary of State Antony Blinken on Wednesday called Iran's announcement of an intent to begin enriching uranium at 60% purity "provocative," saying the step raised questions about the seriousness of Tehran over the nuclear talks in Vienna.
Iran has said it will enrich uranium to 60% - a big step closer to the 90% that is weapons-grade from the 20% maximum it has reached so far - in response to what it says was an act of sabotage by Israel against its key nuclear facility.
"We take very seriously its provocative announcement of an intent to begin enriching uranium at 60 percent," Blinken told a news conference at NATO headquarters in Brussels, referring to Iran.