Iran says a US proposal to end the war is "still being considered", after reports the two sides could be close to an agreement.
US news outlet Axios reported on Wednesday that the White House believes it could be closing in on a 14-point memorandum of understanding with Iran.
A senior member of Iran's parliament dismissed it as a "wish list", while a foreign ministry spokesman said Tehran would share its views of a US proposal with Pakistani mediators.
Pakistan's foreign minister said his country was "endeavouring to convert this ceasefire into a permanent end to this war". President Donald Trump said the US has had "very good talks with Iran in the last 24 hours" and that a deal is possible.
In its report, Axios describes the memorandum as a one-page, 14-point memo which could set a framework for more detailed nuclear negotiations.
