World powers and Iran at talks in Vienna have reached a deal that will limit Iran’s nuclear programme in return for the lifting of sanctions.
Under the agreement, access for nuclear inspectors monitoring Iran’s programme would reportedly not be automatic.
Negotiation had been on between six world powers including the US, Russia and the UK and Iran for several years.
The EU announced a “final plenary” meeting for the current talks in Vienna at 08:30 GMT, followed by a news conference.
The world powers, P5+1 – the US, UK, France, China and Russia plus Germany – want Iran to scale back its sensitive nuclear activities to ensure that it cannot build a nuclear weapon.
Iran, which wants crippling international sanctions lifted, has always insisted that its nuclear work is peaceful.
The BBC reports that shortly after reports of the deal emerged, the International Atomic Energy Agency (IAEA) said it had signed a “roadmap” with Iran.
The IAEA head, Yukiya Amano, told reporters in Vienna that the roadmap was “for the clarification of past and present outstanding issues regarding Iran’s nuclear programme”.
He called the agreement a “significant step forward”, saying it would allow the agency to “make an assessment of issues relating to possible military dimensions to Iran’s nuclear programme by the end of 2015”.
On Monday, Iranian President, Hassan Rouhani, tweeted that if there was a deal with world powers, it would be a “victory of diplomacy and mutual respect over outdated paradigm of exclusion and coercion. And this will be good beginning.”
There has been stiff resistance to a deal from conservatives both in Iran and the US.
Israel’s government has also warned against an agreement.
Following reports of a deal, Israeli Prime Minister Benjamin Netanyahu was quoted as saying that Iran would receive a “sure path to nuclear weapons” and “a cash bonanza of hundreds of billions of dollars”.