Iran accuses US of 'unacceptable' escalation in tensions

Iran accused the United States Thursday of an "unacceptable" escalation of tensions and said Tehran was showing "maximum restraint" despite Washington's withdrawal from a nuclear deal with world powers.

Tensions were already high after President Donald Trump walked away a year ago from the accord which eased international sanctions in return for curbs on Iran's nuclear program.

But strains have ratcheted up with the US deploying an aircraft carrier group and B-52 bombers to the Gulf over alleged threats from Iran.

"The escalation by the United States is unacceptable," Iranian Foreign Minister Mohammad Javad Zarif said in Tokyo, where he is holding talks with Japanese officials.

"We exercise maximum restraint... in spite of the fact that the United States withdrew from JCPOA last May," Zarif said earlier, referring to the agreement on Tehran's nuclear program known as the Joint Comprehensive Plan of Action.

He added that Tehran remains "committed" to the deal, and said continuing assessments showed Iran was in compliance with the multilateral agreement.

Later, Zarif told reporters there was "no possibility" of negotiations with the United States to reduce spiralling tensions, describing US pressure as an "act of suicide".

Zarif's comments came after the US on Wednesday ordered non-emergency staff evacuated from its Baghdad embassy due to an "imminent" threat from Iranian-linked Iraqi militias.

Two major pro-Iran armed groups in Iraq rejected suggestions the embassy personnel were at risk.

Nasr al-Shomari, a military commander for the Iran-backed Harakat al-Nujaba, told AFP the claim was "a pretext" by Washington to create "an uproar" in Iraq.

But the move added to growing fears that the long-time rivals could be on course for conflict despite both sides stressing they have no desire for war.

Trump, however, predicted Iran would "soon" want to negotiate and denied there was any discord in the White House over moves that critics say could lead to war in the Middle East.

"I'm sure that Iran will want to talk soon," the president tweeted.

He also blasted media reports of White House turmoil over Iran, saying "there is no infighting whatsoever. Different opinions are expressed and I make a final and decisive decision."