Jabalia, Gaza - The Alloush family would have been getting ready for breakfast on Sunday morning when an Israeli strike hit their home in northern Gaza, according to a distraught relative.

The blast blew dozens of Palestinians into pieces, Abdullah al-Najjar said from the scene of the attack in Jabalia. Many children were among them, according to rescuers.

At around six o'clock, "there was a very huge explosion... When we arrived here, all the bodies were torn apart," Najjar said.

"This is the loaf of bread that they wanted to eat for breakfast. What's the benefit of a loaf of bread if there is no safety and peace?" he asked, holding up pieces of pita.

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Many others had also been in the Alloush family home, which was being used as "a shelter for people during intensified bombing," Najjar told AFP.

"But they all died."

The civil defense agency in the Gaza Strip said "at least 25" people – 13 children among them – were killed in the house, and more than 30 were injured.

The agency said another strike, on Gaza City's Sabra district, killed five people, and "a number of civilians are still under the rubble."

At the Jabalia house, people searched through the debris, finding personal items including a child's stuffed animal.

Five people carried a white-bearded elderly man on a wheelchair across the rubble beside the remains of the house.

AFP footage showed Palestinians unloading bodies in bloodstained white shrouds from a van at a Jabalia cemetery, before praying and burying them.

Since October 6, Israel's military has engaged in a brutal air and ground assault on northern Gaza including Jabalia.

Contacted about Sunday's strike, Israel's military told AFP it hit a site "in the area of Jabalia in which terrorists were operating."

"These terrorists posed a threat to IDF troops operating in the area. The details are under review," it added.

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But Najjar, a relative of many of the victims, denied they belonged "to any organization" and said they were innocent.

Neighbor Mohammed al-Barsh charged that "children, women, and innocents" are "targets for the Israeli enemy."

A Hamas statement condemned the Jabalia massacre, saying the Alloush family home "was crowded with over 50 innocent civilians."

It said most were women and children, including people "who had been forcibly displaced by the occupation (Israel) from the Jabalia refugee camp."

Israel has slaughtered at least 43,603 people in Gaza since October 2023, according to the territory's health ministry. The British medical journal Lancet and other experts believe the true number to be far greater, upwards of 186,000 as of July 2024.

The UN Human Rights Office (OHCHR) on Friday condemned the number of Palestinian civilians killed by Israel, saying women and children comprised nearly 70% of the thousands of fatalities it had been able to verify.

"Civilians in Gaza have borne the brunt of the attacks, including through the initial 'complete siege' of Gaza by Israeli forces," the OHCHR said.

"Conduct by Israeli forces has caused unprecedented levels of killings, death, injury, starvation, illness and disease."

Israel's mission to the UN in Geneva "categorically" rejected the report, decrying "the inherent obsession of OHCHR with the demonization of Israel."

The heads of UN agencies early this month described northern Gaza as "under siege" and denied "basic aid and life-saving supplies."

Israel's main military backer – the US – on October 15 warned it could withhold some of its billions of dollars in military assistance unless Israel improves aid delivery to Gaza within 30 days.

With that deadline fast approaching, there has been little sign of improvement. A UN-backed assessment on Saturday warned that famine is imminent in northern Gaza.

Fewer aid shipments are allowed in than at any time since October 2023, according to the Integrated Food Security Phase Classification (IPC) report.

An alert Saturday from the Famine Review Committee warned of "an imminent and substantial likelihood of famine occurring, due to the rapidly deteriorating situation in the Gaza Strip."