They greeted with “regret and concern” news that he would re-impose sanctions against Iran, and vowed that they would not follow suit. Theyalso urged Iran's leaders to act with restraint. Loading Britain's Foreign Secretary Boris Johnson called on the US to spell out its vision of a new negotiated settlement with Iran. "Now that the Trump administration has left the JCPOA, the responsibility falls on them to describe how they in Washington will build a new negotiated solution to our shared concerns," Mr Johnson told Parliament. The Chinese foreign ministry said it also would continue to uphold the deal and remain in dialogue to safeguard it.

“China regrets the decision made by the United States ... the JCPOA is a multilateral agreement ... it should be implemented in good faith by all parties.” Mr Geng said China would maintain normal trade ties with Iran, and "uphold a responsible attitude and keep in touch with the relevant parties". Mr Trump announced on Tuesday afternoon, Washington time, that he was keeping his election promise and pulling out of the nuclear deal, saying, "It didn't bring calm, it didn't bring peace and it never will". "It is clear to me that we cannot prevent an Iranian nuclear bomb under the decaying and rotten structure of the current agreement. The Iran deal is defective at its core. If we do nothing, we know exactly what will happen." It was the signature foreign policy achievement of Mr Trump's predecessor, Barack Obama.

Loading Replay Replay video Play video Play video Mr Trump repeated complaints that the deal was too soft on Iran, did nothing to address Iran's ballistic missile program, and helped enable Iran to become a player in other regional conflicts, particularly in Syria and Yemen, and to sponsor terrorism. He referenced a recent claim by Israel's Prime Minister Benjamin Netanyahu that Iran had run a secret nuclear weapons program, in violation of the agreement. Hardline Iranian demonstrators burn US flags during a gathering in front of the former US Embassy in Tehran. Credit:AP Iranian president Hassan Rouhani warned as soon as Trump made his announcement that Iran could restart enriching uranium "without any limitations" within weeks.

However, he said his country would "wait for some weeks and will talk with our friends and allies and other signatories" who he said remained "loyal" to the deal. Mr Rouhani will dispatch his Foreign Minister Mohammad Javad Zarif to the countries remaining in the deal. Iran hopes the European Union will pass laws to protect European firms from any potential US sanctions. In the Iranian Parliament, politicians set fire to a paper US flag and shouted, "Death to America". They also burnt a piece of paper representing the accord signed by six nations in 2015. Oil prices jumped more than 2 per cent, to a 3 1/2 year high, after the announcement as markets expected the supply of oil to fall - a price hike that is likely to flow through to the petrol bowser. Australian Prime Minister Malcolm Turnbull said he "regrets" Mr Trump's decision, and hoped the European move might preserve the agreement.

"We encourage all parties to continue to comply with the deal, and we certainly are trying to support that." Foreign Minister Julie Bishop said she was "disappointed" with Mr Trump's decision. "While the US decision creates uncertainty for the future of the JCPOA, we strongly encourage Iran to continue to abide by its provisions," she said. Mr Obama said the withdrawal was a "mistake" that meant the world might be "faced with the choice between living with that [Iranian nuclear] threat, or going to war to prevent it". But Saudi Arabia said it "fully supports" the measure, and Israel's Mr Netanyahu called it a "bold decision" to reject a "disastrous ... deal".