FM threatens response to 'any inappropriate action' by UK, France, Germany as trio mulls steps after reports show secret nuclear activity and increased uranium enrichment

In a separate confidential report circulated among member states and cited by multiple media outlets, the IAEA claimed that Iran had engaged in undeclared nuclear activities at three sites long under investigation, involving nuclear material that had not previously been disclosed to the UN agency.

Iran carried out secret nuclear activities with material not declared to the UN nuclear watchdog at three locations that have long been under investigation, the watchdog said in a wide-ranging, confidential report to member states seen by Reuters.

Iran has issued a stark warning to Western powers and Israel over what it calls an escalating campaign by the International Atomic Energy Agency (IAEA) and its backers, ahead of a planned sixth round of nuclear talks with the United States.