Iran said there were no signs of contamination at its nuclear sites in Isfahan, Fordo and Natanz after US airstrikes targeted these facilities in the early hours of Sunday.
The National Nuclear Safety System Centre of Iran issued a statement shortly after the attack, saying its radiation detectors had recorded no radioactive release.
“There is no danger to the residents living around the aforementioned sites,” it added.
US President Donald Trump said six bunker-buster bombs were dropped on Fordow, while 30 Tomahawk missiles were fired against other two nuclear sites.
"A full payload of BOMBS was dropped on the primary site, Fordow," he posted on Truth Social.
— Donald J. Trump (@realDonaldTrump) June 21, 2025
However, according to a Reuters report, given the fortification of Fordow nuclear facility—which is buried beneath a mountain south of Tehran—it may take days, if not longer, to know the real impact of the strikes.
Hassan Abedini, deputy political head of Iran's state broadcaster, was quoted by reports as saying that Tehran had evacuated the three sites some time ago.
"The enriched uranium reserves had been transferred from the nuclear centres and there are no materials left there that, if targeted, would cause radiation and be harmful to our compatriots," he said.
An Associated Press report claimed this was the first time the US had used the bunker-buster bombs in combat.
The 30,000-pound bunker-busting American bomb known as the GBU-57 Massive Ordnance Penetrator uses its weight and sheer kinetic force to penetrate underground and then explode, said the report.
