A Russian diplomat taking part in talks to save the landmark Iran nuclear deal said Monday that the negotiations had entered "the drafting stage" though solutions to some of the issues were "still far away".

US President Joe Biden ran supporting a return to diplomacy with Iran but made clear he will not be rushed into re-entering a 2015 nuclear deal trashed by Donald Trump.

Iran's supreme leader Ayatollah Ali Khamenei said Sunday the US must "completely lift" sanctions first, followed by verification by Tehran, before the Islamic republic returns to its nuclear deal commitments.

US President-elect Joe Biden will insist Iran agrees to new demands if it wants the US to return to a nuclear deal and lift sanctions, The New York Times said Wednesday.

A landmark 2015 deal on Iran's nuclear programme has been falling apart since the United States unilaterally pulled out of the agreement in May 2018.

The signatories to the faltering Iran nuclear deal meet in Vienna on Tuesday as the US is urging international sanctions on the Islamic republic to be reimposed and an arms embargo to be extended.

The 2015 Joint Comprehensive Plan of Action (JCPA) known as the Iran nuclear deal was agreed to between Iran, the permanent members of the United Nations Security Council and the European Union.

The remaining signatories to the Iran nuclear deal will meet in Vienna on Sunday to try again to find a way of saving the accord after the US pulled out, amid mounting tensions between Tehran and Washington.

A showdown looms at the United Nations over Iran on Tuesday as President Donald Trump and Iranian leader Hassan Rouhani are set to square off during...

Iran's Foreign Minister Mohammad Javad Zarif warned Sunday that failure to save the nuclear deal after the exit of the United States would be "very dangerous" for Tehran.

Sir: The abrogation of the Iran nuclear peace deal by President Donald Trump did not serve the cause of peace. This was an agreement negotiated by the international community...

Signatories of the Iran nuclear deal are meeting in Vienna on Friday in a bid to save the agreement, as Iran warned the deal had been put "in intensive care" by Washington's dramatic withdrawal earlier this month.