The latest proposal by Iran to end the war is unlikely to be accepted by US President Donald Trump, a CNN report said quoting sources.

The latest Iranian proposal to end the conflict is unlikely to find favour with US President Donald Trump, according to a CNN report citing sources, as it sidesteps core concerns over Tehran’s nuclear programme while offering to reopen the Strait of Hormuz.

The proposal aims to end the Strait of Hormuz blockades, but leaves questions about Tehran’s nuclear programme for later negotiations. 

Iran’s Foreign Minister Abbas Araghchi previously gave Pakistan a list of “red lines” to be conveyed to the US, according to state media.

President Donald Trump signalled on Monday he was unlikely to accept the proposal. Reopening the strait without resolving questions over Iran’s nuclear enrichment or stockpile of near-bomb-grade uranium could remove a key piece of American leverage in the talks, officials said.

Yet allowing the waterway to remain blocked would prolong the higher energy prices that have caused the cost of gas to spike in the US.

US Secretary of State Marco Rubio said the new Iranian proposal “is better than what we thought they were going to submit,” but emphasized that a future deal must block Iran from getting a nuclear weapon.

It wasn’t clear after Monday’s meeting what Trump’s next steps would be. American officials say they remain concerned at what they regard as divisions within Iran’s regime, and are unsure who retains ultimate decision-making power over a prospective deal.

Yet Trump has sounded sceptical in public at the idea of restarting the US bombing campaign, which is on hold after he extended a ceasefire last week.

The White House has declined to comment on the specific contours of the negotiations.

“These are sensitive diplomatic discussions and the U.S. will not negotiate through the press. As the President has said, the United States holds the cards and will only make a deal that puts the American people first, never allowing Iran to have a nuclear weapon,” assistant press secretary Olivia Wales said in a statement to CNN.

Meanwhile, Russia’s Vladimir Putin said he received a message last week from Iran’s new supreme leader, who has not been seen since he was announced as his late father’s successor. Putin made the remarks in a meeting with Araghchi in Russia, where they discussed the war.