Tehran has agreed to invite International Atomic Energy Agency inspectors back into the country, US Vice-President J.D. Vance said on Monday, after a first round of US-Iran talks towards ending the Middle East war.

“The Iranians have agreed to invite IAEA inspectors back into their country,” Vance told reporters at Switzerland’s isolated Burgenstock resort, where his talks with Iran’s chief negotiator Mohammad Bagher Ghalibaf opened on Sunday.

“That is a major milestone for the American people and the first step in permanently denuclearising or permanently ending a nuclear weapons programme in Iran,” he said.

The IAEA estimates that Iran had 440 kilograms (970 pounds) of uranium enriched to 60 per cent – close to the level needed for a bomb.

Iran suspended cooperation with the IAEA after Israel and the US launched a previous wave of attacks in June 2025, and inspectors have not seen the material since.