JERUSALEM >> The Palestinian group Hamas said Friday that it has accepted a proposal from mediators to release one living American-Israeli hostage and the bodies of four dual nationals who had died in captivity. The Israeli prime minister’s office cast doubt on the offer, accusing Hamas of trying to manipulate talks underway in Qatar on the next stage of the Israel-Hamas ceasefire.

Hamas, which rules over what remains of the Gaza Strip, didn’t immediately specify when the release of soldier Edan Alexander and the four bodies would take place — or what it expected to get in return.

Alexander was 19 when he was abducted from his base on the border with Gaza in southern Israel during Hamas’ attack on Oct. 7, 2023 that sparked the war, which has been the deadliest and most destructive fighting ever between Israel and Hamas.

It wasn’t clear which mediators proposed what Hamas was discussing. Egypt, Qatar and the U.S. have been guiding negotiations, and none had confirmed making the suggestion as of Friday night.

U.S. officials, including envoy Steve Witkoff, said Friday that they had presented a proposal Wednesday to extend the ceasefire a few more weeks as the sides negotiate a permanent truce.

The officials said in a statement that Hamas was claiming flexibility in public while privately making “entirely impractical” demands.

Israeli Prime Minister Benjamin Netanyahu’s office said that Israel had “accepted the Witkoff outline and showed flexibility,” but that Hamas was refusing to do so.

“At the same time, it continues to use manipulation and psychological warfare — the reports about Hamas’ willingness to release American hostages are intended to sabotage the negotiations,” read a letter from the government to hostage families.

It added that Israel’s negotiating team would return Friday from Qatar’s capital, Doha.

Netanyahu said that he plans to convene his ministerial team Saturday night to hear from the negotiators and decide on the next steps.

Hamas, meanwhile, sent a delegation to Cairo to discuss the ceasefire negotiations with Egyptian officials.

Hamas official Husam Badran reaffirmed Friday what he said was the group’s commitment to fully implementing the ceasefire agreement in all its phases.

He warned that any Israeli deviation from the terms would return negotiations to square one.

The White House announced last week that American officials had engaged in “ongoing talks and discussions” with Hamas, stepping away from a long-held U.S. policy of not directly engaging with the group.

That prompted a terse response from Netanyahu’s office.

The U.S. said Friday that under its proposal, Hamas would release Alexander and other living hostages in exchange for Palestinian prisoners and increased humanitarian aid to Gaza.

The fighters were told that the proposal would have to be accepted soon, the U.S. statement said, adding that delay would not pay off for Hamas.

The first phase of the ceasefire ended two weeks ago, but the pause in fighting has held — if tensely — for now.

The initial phase allowed the return of 25 living hostages and the remains of eight others in exchange for the release of nearly 2,000 Palestinian prisoners.