President Obama heralded the framework nuclear understanding with Iran as an ``historic'' agreement that could pave the way for a final deal that would leave the US, its allies and the world safer.

The United States, Iran and five other world powers have announced a deal outlining limits on Iran’s nuclear programme so it cannot lead to atomic weapons.

Iran nuclear talks have adjourned after an all-night session and will resume in a few hours.

Diplomats are scrambling to reach agreement just hours ahead of a self-imposed deadline on the outline of an Iran nuclear deal.

“Substantial progress” has been made toward ensuring that Iran’s nuclear program will not lead to weapons development, US Secretary of State John Kerry said.

A nuclear deal should be the means for the international community to engage Iran in addressing the difficult issues in the volatile region, writes Carl Bildt.

US Secretary of State John Kerry is consulting with allies on how to overcome deep obstacles to reach a nuclear deal with Iran, three days before the deadline.

Talks are underway in high-level negotiations to limit Iran’s nuclear programme in exchange for easing crippling sanctions on the Islamic republic’s economy.

Iran has pulled out of talks with six world powers in protest at the expansion of US sanctions, saying the blacklisting of more entities violates the spirit of a groundbreaking agreement over Tehran’s atomic programme.

Israel has harshly criticised the international community’s nuclear deal with Iran, accusing the world of “self-delusion” and saying the first-stage agreement would not halt Tehran’s pursuit of a nuclear weapon.

Iran has struck a historic nuclear deal with the United States and five other world powers in the most significant development between Washington and Tehran in more than 30 years of hostility.

US Secretary of State John Kerry and foreign ministers of other major powers converged today to lend their weight to the Iran nuclear talks after envoys reported progress on key issues blocking an interim agreement to curb the Iranian programme in return for limited sanctions relief.

Iran has proposed what it calls a potential breakthrough plan at talks on its nuclear development programme.

Iran will be ready to resume nuclear talks with world powers as soon as the country’s president-elect puts together his negotiating team, the foreign minister has said.

Iran and six world powers failed to reach agreement today on a common approach to reducing fears that Tehran might misuse its nuclear technology to make weapons, with the EU’s foreign policy chief declaring that the two sides “remain far apart on substance”.

Iran and six world powers have launched a new attempt to break deadlocked negotiations meant to reduce international tensions over Tehran’s nuclear activities.

The UN nuclear agency has found traces of uranium at Iran’s underground atomic site enriched to higher than previous levels and closer to what is needed for nuclear weapons, diplomats say.

Iranian negotiators have rejected proposals by six world powers to curb Tehran’s nuclear programme.

Talks between Iran and six world powers snagged over conflicting proposals about Tehran’s nuclear programme, a tug-of-war that pits international concerns about the Islamic republic’s potential to build atomic weapons against enforcing crippling sanctions on its people.

The head of the UN nuclear agency has flown to Tehran on a delicate mission that - if successful – could finally lift the veil on whether Iran is seeking atomic arms while strengthening the Islamic Republic’s negotiating hand in crucial nuclear talks with six world powers later in the week.

Iran says it has repeated an offer to the five permanent UN Security Council members and Germany to resume talks over the country’s disputed nuclear program.

The United States will not hesitate to attack Iran with military force to prevent it from acquiring a nuclear weapon, President Barack Obama warned today.

Iran has rapidly ramped up production of higher-grade enriched uranium over the last four months, the UN nuclear agency says in a confidential report.

A United Nations team visiting Iran have no plans to inspect the country’s nuclear facilities but will only hold talks with officials in Tehran, a Foreign Ministry spokesman said today.

UN nuclear inspectors arrived in Iran today in the latest push to hold talks about how far the country’s controversial nuclear programme has come.

Oil prices jumped to nearly 105 dollars a barrel – a nine-month high – in Asia today, after Iran said it halted crude exports to Britain and France in a dispute over its nuclear programme.

Iran has halted oil shipments to Britain and France, the Oil Ministry said today, in an apparent pre-emptive blow against the European Union after the bloc imposed sanctions on Iran’s crucial fuel exports.

The next round of talks between Iran and six world powers on the country’s nuclear program will be held in Istanbul, Iran’s foreign minister said today.

Iran is poised to greatly expand uranium enrichment at a fortified underground bunker to a point that would boost how quickly it could make nuclear warheads, diplomats said.

Iran’s parliament has approved a bill to reduce Tehran’s diplomatic relations with London and withdraw the country’s ambassador to Britain.

The UK has severed all financial ties with Iranian banks in an unprecedented move in response to mounting fears over the country’s nuclear ambitions.

Iran’s first nuclear power plant has been connected to the national power grid for a test run, state radio says.

Iran is preparing to install advanced machinery at its new uranium enrichment site.

The head of the UN nuclear watchdog agency says he cannot guarantee that Iran is not trying to develop atomic arms.

Iran has invited Russia, China, the European Union and its allies among the Arab and developing world to tour its nuclear sites.

Iran is trying to build a nuclear bomb, posing a threat to its neighbours, and the United States is “very ready” to counter Iran should it make a move, the top US military officer said today.

Iran and six world powers today ended talks on its nuclear plans with an agreement to reconvene early next year, indicating Tehran may be willing to address Western concerns.

Britain today called on Iran to “engage seriously and constructively” with international concerns over its nuclear ambitions in talks scheduled for the coming days.

Iran’s president has confirmed for the first time that a computer worm affected centrifuges in the country’s uranium enrichment programme.

Israel today claimed Iran has enough enriched uranium to build one nuclear bomb and will soon will be able to produce a second.

Iran began loading fuel into its first nuclear power plant today, moving closer to its opening in the face of Western fears over its eventual plans for weapons.

Iran began loading fuel into the core of its first nuclear power plant today, moving closer to the start-up of a facility that has provoked controversy in the international community.

Iran said today it was ready to resume talks about its nuclear programme with the international community within a matter of weeks.

The US, Britain and France expressed growing concern today that Iran is pursuing a nuclear weapons programme and developing ballistic missiles capable of delivering nuclear weapons.