Speaking to Tasnim on Friday, Salehi confirmed what Parliament Speaker Mohammad Baqer Qalibaf had announced in a tweet earlier in the day.
“Uranium enrichment at 60% purity level is underway at Natanz facility,” Salehi said.
The Iranian nuclear chief said the details will be announced in a few hours.
Qalibaf had earlier said, “I am proud to announce that at 00:40 last night … young and pious Iranian scientists were able to obtain a 60% enriched uranium product.”
“We congratulate the brave people of the Islamic Iran on this success; the will of the Iranian people is miraculous and will thwart any conspiracy.”
The announcement came days after Iran informed the International Atomic Energy Agency (IAEA) of a plan to start 60-percent uranium enrichment, following an act of sabotage against the Natanz nuclear facility, which Iran called “nuclear terrorism”.