GAZA/TEL AVIV, Nov 22 (Reuters) - Israel's government voted on Wednesday to back a deal for Palestinian Hamas militants to free 50 women and children held as hostages in Gaza in exchange for a four-day pause in fighting, the office of Prime Minister Benjamin Netanyahu said.

Officials from Qatar, which has been mediating negotiations, as well as the U.S., Israel and Hamas have for days been saying a deal was imminent.

Hamas is believed to be holding more than 200 hostages, taken when its fighters surged into Israel on Oct. 7, killing 1,200 people, according to Israeli tallies.

A statement by the Prime Minister's Office said 50 women and children will be released over four days, during which there will be a pause in fighting.

For every additional 10 hostages released, the pause would be extended by another day, it said, without mentioning the release of Palestinian prisoners in exchange.

A U.S. official briefed on the discussions had said ahead of the deal that it would include the exchange of 150 Palestinian prisoners.

"Israel's government is committed to return all the hostages home. Tonight, it approved the proposed deal as a first stage to achieving this goal," said the statement, released after hours of deliberation that were closed to the press.

Israel's Ynet reported that all but three ministers in the far-right Jewish Power party voted in favour of the deal.

The accord will see the first truce of a war in which Israeli bombardments have flattened swathes of Hamas-ruled Gaza, killed 13,300 civilians in the tiny densely populated enclave and left about two-thirds of its 2.3 million people homeless, according to authorities in Gaza.

Before gathering with his full government, Netanyahu met on Tuesday with his war cabinet and wider national security cabinet over the deal.

Ahead of the announcement of the deal, Netanyahu said the intervention of U.S. President Joe Biden had helped to improve the tentative agreement so that it included more hostages and fewer concessions.

But Netanyahu said Israel's broader mission had not changed.

"We are at war and we will continue the war until we achieve all our goals. To destroy Hamas, return all our hostages and ensure that no entity in Gaza can threaten Israel," he said in a recorded message at the start of the government meeting.

The pause would also allow for humanitarian aid into Gaza.

Israeli media including Channel 12 news said the first release of hostages was expected on Thursday. Implementing the deal must wait for 24 hours to give Israeli citizens the chance to ask the Supreme Court to block the release of Palestinian prisoners, reports said.

Hamas has to date released only four captives: U.S. citizens Judith Raanan, 59, and her daughter, Natalie Raanan, 17, on Oct. 20, citing "humanitarian reasons," and Israeli women Nurit Cooper, 79, and Yocheved Lifshitz, 85, on Oct. 23.

The armed wing of the Palestinian militant group Islamic Jihad, which participated in the Oct. 7 raid with Hamas, said late on Tuesday that one of the Israeli hostages it has held since the Oct. 7 attacks on Israel had died.

"We previously expressed our willingness to release her for humanitarian reasons, but the enemy was stalling and this led to her death," Al Quds Brigades said on its Telegram channel.

Photo from Reuters