Iranian President Masoud Pezeshkian put into effect on Wednesday a law passed by parliament last week to suspend cooperation with the UN nuclear watchdog, the IAEA, Iranian state media reported.
Iran has threatened to halt cooperation with the IAEA, accusing it of siding with Western countries and providing a justification for Israel's air strikes, which began a day after the IAEA board voted to declare Iran in violation of obligations under the Nuclear Non-Proliferation Treaty.
The law stipulates that any future inspection of Iran's nuclear sites by the International Atomic Energy Agency needs approval by Tehran's Supreme National Security Council.
"We are aware of these reports. The IAEA is awaiting further official information from Iran," the IAEA said in a statement.
Separately, Iranian Foreign Minister Abbas Araqchi said in an interview with CBS News, that the US bombing of Iran's key Fordow nuclear site has "seriously and heavily damaged" the facility.
"No one exactly knows what has transpired in Fordow. That being said, what we know so far is that the facilities have been seriously and heavily damaged," Araqchi said in the interview broadcast on Tuesday.
"The Atomic Energy Organization of the Islamic Republic of Iran... is currently undertaking evaluation and assessment, the report of which will be submitted to the government."
Previously Washington Post reported that intercepted Iranian communications downplayed the extent of damage caused by US strikes on Iran's nuclear program, citing four people familiar with classified intelligence circulating within the US government.
President Donald Trump has said the strikes "completely and totally obliterated" Iran's nuclear program, but US officials acknowledge it will take time to form a complete assessment of the damage caused by the US military strikes last weekend.
US military bombers carried out strikes against three Iranian nuclear facilities early Sunday local time using more than a dozen 30,000-pound bunker-buster bombs. The results of the strikes are being closely watched to see how far they may have set back Iran's nuclear programme.
"I'm not aware of any intelligence that I've reviewed that says things were not where they were supposed to be, moved or otherwise," Hegseth said in an often fiery news conference that was also watched by President Donald Trump.
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