Residents and a medical worker in Gaza said they had heard no new fighting or military strikes since about half an hour before the ceasefire was finally implemented on Sunday.
Israeli air strikes and artillery attacks killed 13 Palestinians between 0630 GMT (5.30pm AEDT) Sunday, when the ceasefire was meant to begin, and 0915 GMT (8.15pm AEDT), when it took effect, Palestinian medics said.
UNRWA has 4,000 truckloads of aid ready to enter — UNRWA (@UNRWA) #Gaza — half of them carry food and flour.Attacks on aid convoys in the Gaza Strip could decline as humanitarian relief comes in following a #ceasefire, says @UNLazzarini.https://t.co/yRt1NxWuXSJanuary 19, 2025
Israel blamed Hamas for the delay after the Palestinian militant group failed to provide a list naming the first three hostages to be released under the deal.
Hamas attributed the delay to "technical" reasons, without specifying what those were.
A Palestinian official familiar with the matter, speaking on condition of anonymity, said the delay occurred because mediators had asked for 48 hours of "calm" before the ceasefire's implementation, but continued Israeli strikes until the deadline had made it difficult to send the list.
Two hours after the deadline, Hamas said it had sent the list of names, and Israeli officials confirmed receipt.
Hamas named the hostages it was to release on Sunday as Romi Gonen, Doron Steinbrecher and Emily Damari.
Israel did not immediately confirm the names.
The highly anticipated ceasefire deal could help usher in an end to the Gaza war, which began after Hamas, which controls the tiny coastal territory, attacked Israel on October 7, 2023, killing some 1200 people, according to Israeli authorities.
Israel's response has reduced much of Gaza to rubble and killed almost 47,000 Palestinians, according to Gaza-based health authorities.
Israeli hostages in Gaza will be released in return for almost 2000 Palestinian prisoners. (AP PHOTO)
The war also set off a confrontation throughout the Middle East between Israel and its arch-foe Iran, which backs Hamas and other anti-Israeli and anti-American paramilitary forces across the region.
Ahead of the ceasefire's agreed implementation at 0630 GMT, Israeli Prime Minister Benjamin Netanyahu said it could not take effect until Hamas gave the names of the hostages up for release on Sunday.
Israeli military spokespeople said in separate statements on Sunday that their aircraft and artillery had attacked "terror targets" in northern and central Gaza and the military would continue to attack the strip as long as Hamas did not meet its obligations under the ceasefire.
The Palestinian Civil Emergency Service said at least 13 people were killed in the Israeli attacks and dozens wounded.
Medics reported tanks firing at the Zeitoun area of Gaza City and said an air strike and tank fire also hit the northern town of Beit Hanoun, sending residents who had returned there in anticipation of the ceasefire fleeing.
Israeli forces had started withdrawing from areas in Gaza's Rafah to the Philadelphi corridor along the border between Egypt and Gaza, pro-Hamas media reported early on Sunday.
The three-stage ceasefire agreement followed months of on-off negotiations brokered by Egypt, Qatar and the US and came just ahead of Monday's inauguration of US President-elect Donald Trump.
Its first stage will last six weeks, during which 33 of the remaining 98 hostages - women, children, men older than 50, the ill and wounded - will be released in return for almost 2000 Palestinian prisoners and detainees.
The war in Gaza has killed almost 47,000 Palestinians, according to Gaza's health ministry. (AP PHOTO)
They include 737 male, female and teenage prisoners, some of who are members of militant groups convicted of attacks that killed dozens of Israelis, as well as hundreds of Palestinians from Gaza in detention since the start of the war.
The first three are female hostages expected to be released through the Red Cross on Sunday.
In return for each, 30 Palestinian prisoners held in Israeli jails are to be released.
Under the terms of the deal, Hamas will inform the International Committee of the Red Cross (ICRC) where the meeting point will be inside Gaza and the ICRC is expected to begin driving to that location to collect the hostages, an official involved in the process told Reuters.
US President Joe Biden's team worked closely with Trump's Middle East envoy Steve Witkoff to push the deal over the line.
But what will come next in Gaza remains unclear in the absence of a comprehensive agreement on the postwar future of the enclave, which will require billions of dollars and years of work to rebuild.
Hamas, which has controlled Gaza for almost two decades, has survived despite losing its top leadership and thousands of fighters.
Israel has vowed it will not allow Hamas to return to power and has cleared large stretches of ground inside Gaza - a step widely seen as a move towards creating a buffer zone that will allow its troops to act freely against threats in the enclave.
