GAZA STRIP, Palestinian Territories: Gaza’s largest hospital has become a “death zone,” the World Health Organization (WHO) said Sunday, announcing plans to evacuate the last remaining patients as Israel’s army said it was expanding operations to destroy Hamas.

The assessment came after a visit by WHO and other UN officials to the hospital, which Israeli troops raided earlier this week in pursuit of Hamas militants.

Elsewhere, a Hamas health official said more than 80 people were killed Saturday in twin strikes on a northern Gaza refugee camp, including on a UN school sheltering displaced people.

Social media videos verified by Agence France-Presse showed bodies covered in blood and dust on the floor of a building where mattresses had been wedged under school tables in Jabalia, the Palestinian territory’s biggest refugee camp.

Philippe Lazzarini, head of the UN agency for Palestinian refugees UNRWA, described “horrifying images” from the incident, while Egypt called the bombing a “war crime” and “a deliberate insult to the United Nations.”

A separate strike Saturday on another building in Jabalia camp killed 32 people from the same family, 19 of them children, Hamas health authorities said.

Without mentioning the strikes, the Israeli army said “an incident in the Jabalia region” was under review.

Israel has vowed to destroy the Palestinian armed group Hamas in response to the October 7 attacks, which Israeli officials say killed about 1,200 people, most of them civilians, and saw about 240 people taken hostage.

The army’s relentless air and ground campaign has since killed 12,300 people, more than 5,000 of them children, according to the Hamas government, which has ruled Gaza since 2007.

The UN says some 1.6 million people have been displaced inside the Gaza Strip by six weeks of fighting, and Israel said Saturday its military was “expanding its operational activities in additional neighborhoods... of the Gaza Strip.” ‘Extreme suffering’ Gaza’s largest hospital, Al-Shifa, has been a key focus in recent days, with Israeli forces alleging Hamas uses it as a command center — a claim denied by the group and medical staff.

On Saturday, hundreds of people fled the hospital on foot on orders from the Israeli army, according to the facility’s director.

Columns of sick and injured — some of them amputees — were seen leaving with displaced people, doctors and nurses as loud explosions were heard around the complex.

Nongovernment group Doctors Without Borders said a convoy carrying its staff and family members came under attack Saturday while evacuating from near Al-Shifa, despite coordinating with both sides. One person was killed.

The WHO said 29 patients at the hospital with serious spinal injuries cannot move without medical assistance, and others have infected wounds due to lack of antibiotics.

There are also 32 babies in “extremely critical condition,” WHO said.

In a scene now tragically familiar in Gaza, mourning relatives wept at the hospital where the bodies of those killed were laid out on the ground in white, blood-stained shrouds, several children among them.

Diplomacy to secure the release of hostages held by Palestinian militants is continuing, with a US official saying more fuel deliveries and a “significant pause” in fighting would come “when hostages are released.”