Three European powers met with an Iranian minister to try to reopen negotiations over the limits of its nuclear activities.

Iran, a close ally and backer of Hamas, dismissed Trump’s remarks as “absolutely baseless”. Foreign ministry spokesman Esmaeil Baqaei called the claim “a form of projection and evasion of responsibility and accountability” on the US president’s part.

Iranian and European diplomats are set to meet in Istanbul to embark on the latest drive to unpick the deadlock over Tehran’s nuclear program.

Iran said it would continue nuclear talks with European powers after "serious, frank, and detailed" conversations on Friday, the first such face-to-face meeting since Israel and the U.S. bombed Iran last month.

The warning from Iran’s deputy foreign minister came days before he is set to travel to Istanbul for nuclear talks with European counterparts.

Iran is ready to engage in talks on its nuclear program with the United States, but only if Washington takes meaningful steps to rebuild trust.

If the snapback is triggered, Iran will not show more restraint in this regard,' Iran's lead nuclear negotiator told reporters.

Satellite images show Iran has reopened a blocked tunnel at its Isfahan nuclear complex, with signs of new construction at Fordow. Expert David Albright warns the regime may be preparing to quickly restore key underground nuclear capabilities.

A top Iranian official has warned that European threats to reimpose sanctions on Iran could trigger the country to withdraw from an international pact that limits the spread of nuclear weapons.