Iran has warned it would retaliate if European powers "exploit" a UN report showing it has stepped up production of highly enriched uranium.
The report by the International Atomic Energy Agency said Iran had sharply increased its stockpile of uranium enriched to up to 60 percent, close to the roughly 90 percent level needed for atomic weapons.
Iran's total amount of enriched uranium now exceeds 45 times the limit authorised by a landmark 2015 agreement with world powers, and is estimated at 9,247.6 kilogrammes, according to the confidential IAEA report.
Iran says it will provide an "appropriate response" to the proposal in line with its principles and interests.
The nuclear watchdog report
The European trio have warned they could reimpose sanctions if Iran's nuclear programme threatens the continent's security.
Iranian Foreign Minister Abbas Araghchi said in a statement he had told IAEA chief Rafael Grossi in a phone call that "Iran will respond to any inappropriate action by the European parties" to the 2015 agreement, referring to Britain, France and Germany.
Araghchi urged Grossi in their Saturday call to stop "parties from exploiting" the nuclear watchdog report "to advance their political objectives", according to the statement.
Iran rejected the IAEA report, the latest move in years-long efforts to restrict its nuclear activities over fears that it is seeking to develop nuclear weapons.
The country has denied seeking nuclear arms and says it needs the uranium for civilian power production.
"In its indirect talks with the United States, Iran emphasises its right to peaceful use of nuclear energy and clearly declares that it is not seeking nuclear weapons," Araghchi says.
