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.
Interior ministers of the Gulf Cooperation Council (GCC) have held an emergency ministerial meeting in Riyadh, chaired by the Kingdom of Bahrain, according to the Saudi Press Agency.
Gunshots broke out in chaotic scenes at the Philippine Senate on Wednesday where troops had been deployed after a politician wanted by the International Criminal Court urged supporters to mobilise and thwart his imminent arrest.
US President Donald Trump and an entourage that included Nvidia's Jensen Huang and Elon Musk were greeted with a lavish welcome in Beijing on Wednesday as he prepared to ask China's Xi Jinping to "open up" to US business at the start of their two-day summit.
Israeli airstrikes killed eight people on a highway south of Beirut on Wednesday, Lebanon's health ministry said, as conflict between Hezbollah and Israel continued on the eve of a third round of US-mediated talks between Lebanon and Israel.