A US official said on Monday that President Donald Trump is unhappy with an Iranian proposal because it did not address Iran's nuclear program.
"He doesn't love the proposal," the US official said, referring to Trump.
Earlier in the day, Trump discussed the proposal with his top national security aides. The US-Iran conflict remains in a stalemate, with energy supplies from the region reduced.
Iranian sources earlier on Monday said the proposal would set aside discussion of Iran's nuclear program until the war has ended and disputes over shipping from the Gulf are resolved. Washington has said nuclear issues must be dealt with from the outset.
Work to bridge gaps between the US and Iran has not halted, sources from mediator Pakistan have said.
But hopes of reviving peace efforts have receded since Trump announced this weekend he had scrapped a visit by his special envoy Steve Witkoff and son-in-law Jared Kushner to Islamabad, the Pakistani capital.

Trump touts $5,000 payout if Republicans win as Vance waits in wings
Search expands after Philippine ferry fire kills five and leaves dozens missing
Trump says Iran war to end after US midterm elections
US military says it struck vessel in Caribbean, killing 3
At least 14 killed in explosion at weapons depot in Syria
US hits five Iranian oil tankers after attack on Navy ships
UK gives air traffic provider a week to probe outage that halted flights
Serbia's President Vucic dissolves parliament, calls snap elections
