Oil prices rose Monday as talks to end the Iran war appeared to be at a standstill and the crucial Strait of Hormuz no nearer being reopened.

While the White House has said Donald Trump and his team were considering Tehran’s latest proposal to restore traffic through the waterway, CNN and the Wall Street Journal said the president was sceptical.

The Islamic republic this week submitted a plan that would reportedly see it ease the chokehold and Washington lift its retaliatory blockade on the country’s ports as talks continued, including over its nuclear programme.

While US Secretary of State Marco Rubio said Iran’s proposal was “better than what we thought they were going to submit”, he insisted any eventual deal had to be “one that definitively prevents them from sprinting towards a nuclear weapon”.

Iranian defence ministry spokesman Reza Talaei-Nik said Washington “must abandon its illegal and irrational demands”, adding the United States was “no longer in a position to dictate its policy to independent nations”.

Qatar warned of the possibility of a “frozen conflict” if a definitive resolution is not found.

Concerns about the stalled peace push have pushed crude prices higher for more than a week, with Trump’s decision to cancel his envoys’ trip for peace talks in Pakistan last weekend adding to the downbeat mood.

Brent is above the level it hit before the two sides announced a ceasefire at the start of April, while West Texas Intermediate broke $100 Tuesday for the first time in two weeks.

Both contracts continued to rise Wednesday, with Brent holding above $113 and WTI above $101.

“Iran wants the blockade lifted and access to its flows restored,” wrote Stephen Innes at SPI Asset Management.

“Washington holds that lever and is in no hurry to give it away without extracting value.