CAIRO — The ceasefire between Hamas and Israel will go into effect Sunday at 8:30 a.m. local time (0630 GMT), mediator Qatar announced Saturday, as families of hostages held in Gaza braced for news of loved ones, Palestinians prepared to receive freed detainees and humanitarian groups rushed to set up a surge of aid.

Israel Approves Ceasefire Deal

The overnight approval of the deal by Israel’s Cabinet, in a rare meeting during the Jewish Sabbath, set off a flurry of activity and a fresh wave of emotions as relatives wondered whether hostages would be returned alive or dead. The names of the first hostages to be freed were expected to be released later Saturday.

The pause in 15 months of war is a step toward ending the deadliest, most destructive fighting ever between Israel and the Hamas militant group — and comes more than a year after the only other ceasefire achieved.

The first phase of the ceasefire will last 42 days, and negotiations on the far more difficult second phase are meant to begin just over two weeks in. After those six weeks, Israel’s security Cabinet will decide how to proceed.

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Continued Violence Before Ceasefire

Israeli airstrikes continued Saturday, and Gaza’s Health Ministry said 23 bodies had been brought to hospitals over the past 24 hours.

“What is this truce that kills us hours before it begins?” asked Abdallah Al-Aqad, the brother of a woman killed by an airstrike in the southern city of Khan Younis. Health officials said a couple and their two children, aged 2 and 7, were dead.

And sirens sounded across central and southern Israel, with the military saying it intercepted projectiles launched from Yemen. Iran-backed Houthi rebels there have stepped up attacks in recent weeks, calling it solidarity with Palestinians in Gaza.

Details of the Ceasefire Agreement

In the ceasefire’s first phase, 33 hostages in Gaza are set to be released over six weeks in exchange for 737 Palestinian prisoners held by Israel. Israel’s justice ministry has published a list of the prisoners, all younger or female.

According to the ceasefire plan approved by Israel’s Cabinet, the exchange will begin at 4 p.m. (1400 GMT) Sunday. The plan says three living female hostages will be returned on Day 1, four on Day 7 and the remaining 26 over the following five weeks. During each exchange, Palestinian prisoners will be released by Israel after hostages have arrived safely.

Also to be released are 1,167 Gaza residents who were not involved in the Oct. 7, 2023, Hamas-led attack that sparked the war. All women and children under 19 from Gaza held by Israel will be freed during this phase.

All Palestinian prisoners who were convicted of deadly attacks will be exiled to Gaza or abroad — some for three years and others permanently — and barred from returning to Israel or the West Bank.

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Humanitarian Aid and Troop Movements

Also during the ceasefire’s first phase, Israeli troops are to pull back into a buffer zone about a kilometer (0.6 miles) wide inside Gaza, along its borders with Israel.

That will allow many displaced Palestinians to return to their homes, including in Gaza City and largely isolated and devastated northern Gaza. With most of Gaza’s population sheltering in massive, squalid tent camps, Palestinians are desperate to get back to their homes, even though many were destroyed or heavily damaged.

Gaza should also see a surge in food, medical supplies and other humanitarian aid. Trucks were lined up Friday on the Egyptian side of the Rafah border crossing into Gaza.

On Saturday, two Egyptian government ministers arrived in the northern Sinai Peninsula to oversee preparations for delivering aid through the Rafah crossing as well as the Kerem Shalom crossing, and to receive the evacuation of wounded patients, Egypt’s health ministry said.

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The ceasefire plan approved by Israel’s Cabinet says all trucks entering Gaza will be subject to Israeli inspections.

The Hamas-led Oct. 7 attack killed some 1,200 people and left some 250 others captive. Nearly 100 hostages remain in Gaza.

Israel responded with an offensive that has killed more than 46,000 Palestinians, according to local health officials, who do not distinguish between civilians and militants but say women and children make up more than half the dead.