Israeli airstrikes hit a cluster of houses in central Gaza's Al-Bureij camp, killing at least 15 people, and the nearby Al-Nuseirat camp, killed four, medics said. Nuseirat and Bureij are among the densely populated enclave's eight historic camps and seen by Israel as strongholds of armed militants.

Israeli aircraft also bombed a house in the heart of Gaza City in the north, killing five Palestinians, while another airstrike in the southern city of Khan Younis killed one person and wounded others, according to medics.

Later on Thursday, 15 Palestinians were killed and 30 injured in Israeli bombings of two schools east of Gaza City, the territory's Civil Emergency Service said in a statement.

The Israeli military said it struck Hamas command and control centres embedded in the Abdel-Fattah Hamouda and Al-Zahra schools in the Tuffah neighbourhood of Gaza City, where Hamas militants were operating.

It accused Hamas of exploiting civilians and civilian properties for military purposes, an allegation Hamas denies.

Footage circulated on social media, which Reuters could not immediately verify, showed casualties being brought to a hospital on donkey carts.

The armed wings of Hamas and Islamic Jihad said they were firing anti-tank rockets and mortar bombs at Israeli forces operating across Gaza, causing deaths and injuries among them.

Israel's military said it had struck dozens of military targets across Gaza over the past 24 hours, including rocket launching pads.

Hamas-led militants set off the Gaza war on Oct. 7 last year with a shock, cross-border rampage into Israeli communities, killing 1,200 Israelis and foreigners and seizing some 250 hostages, according to Israeli tallies.

Since then, at least 39,699 Palestinians have been killed, including 22 within the past 24 hours, and 91,722 injured in Israel's devastating air and ground war in Gaza, the Gaza health ministry said in an update on Thursday.

The ministry in the Hamas-run territory does not distinguish between combatants and civilians in its death lists.

As Gaza's war churns on, Israel has been battening down for another attack expected in the coming days following vows from Iran and its Lebanon proxy Hezbollah to retaliate for the assassinations last week of Hamas leader Ismail Haniyeh in Tehran and Hezbollah military commander Fuad Shukr in Beirut.

A relatively contained conflict between Israel and Hezbollah along its northern border, a spillover from the Gaza fighting, now threatens to spiral into an all-out regional war.

MORE BURIALS IN GAZA

On Thursday dozens of Palestinians rushed into Nasser Hospital in Khan Younis to bid farewell to slain relatives before carrying them away for burials.

Reuters footage showed relatives moving out the bodies of their loved ones in plastic bags with names written on them, and holding special prayers before the funerals.

The Israeli military renewed evacuation orders to Palestinian residents in several districts in eastern Khan Younis, saying it would act forcefully against militants who had unleashed rockets from those areas.

The army posted the evacuation order on X, and residents said they had received text and audio messages.

Residents said dozens of families had begun to leave their homes and head west towards Al-Mawasi, a humanitarian-designated area but one that is overcrowded by displaced families from around the enclave.

On Thursday, the World Central Kitchen (WCK), a U.S.-based, non-governmental humanitarian agency, said that a Palestinian staff member, Nadi Sallout, had been killed while apparently off duty on Wednesday near Deir Al-Balah in central Gaza. The WCK said it was seeking further details.

The Israeli military said it did not know of any such incident, adding that it had been in contact with WCK.

In April, seven WCK employees were killed in an Israeli airstrike, spurring it to suspend operations for nearly a month.

Israel said then its inquiries had found serious errors and breaches of procedure by its military, and that two senior officers had been dismissed and senior commanders reprimanded.