KHAN YOUNIS, Gaza Strip — Health officials and people trapped inside Gaza’s largest hospital rejected Israel’s claims that it was helping babies and others evacuate Sunday, saying fighting continued just outside the facility where incubators lay idle with no electricity and critical supplies were running out.

Prime Minister Benjamin Netanyahu has dismissed urgent international calls for a cease-fire unless it includes the release of all the nearly 240 hostages captured by Hamas in the Oct. 7 rampage that triggered the war.

A day after Netanyahu said Israel was bringing its “full force” with the aim of ending Hamas’ 16-year rule in Gaza, residents reported heavy airstrikes and shelling, including around Shifa Hospital. Israel, without providing evidence, has accused Hamas of concealing a command post inside and under the compound, allegations denied by Hamas and hospital staff.

“They are outside, not far from the gates,” said Ahmed al-Boursh, a resident sheltering at the facility.

The hospital’s last generator ran out of fuel Saturday, leading to the deaths of three premature babies and four other patients, according to the Health Ministry. It said another 36 babies are at risk of dying.

Israel’s military asserted it placed 300 liters (634 pints) of fuel near Shifa overnight for an emergency generator for incubators for premature babies and coordinated the delivery with hospital officials. “Sadly, they haven’t taken the fuel yet,” spokesperson Lt. Col. Richard Hecht said. He said if this fuel doesn’t work, they will seek “other solutions for the babies.”

A Health Ministry spokesperson, Ashraf al-Qidra, told Al Jazeera that “someone contacted the director and said they have 200 liters of fuel. These 200 liters give less than an hour to run the generator. ... This is a mockery towards the patients and children.”

Speaking to CNN, Netanyahu asserted that “100 or so” people had been evacuated from Shifa and that Israel had created safe corridors.

But Health Ministry Undersecretary Munir al-Boursh said Israeli snipers have deployed around Shifa, firing at any movement inside the compound. He said airstrikes had destroyed several homes next to the hospital, killing three people, including a doctor.

“There are wounded in the house, and we can’t reach them,” he told Al Jazeera. “We can’t stick our heads out of the window.”

The military said troops would assist in moving babies on Sunday. But Medical Aid for Palestinians, a U.K.-based charity that has supported Shifa’s neonatal intensive care unit for years, questioned that. “The transfer of critically ill neonates is a complex and technical process,” CEO Melanie Ward said in a statement. “With ambulances unable to reach the hospital ... and no hospital with capacity to receive them, there is no indication of how this can be done safely.”

The only safe option is for Israel to stop its assault and allow fuel to reach the hospital, Ward said.

The Health Ministry said there are still 1,500 patients at Shifa, along with 1,500 medical personnel and between 15,000 and 20,000 people seeking shelter.

The Palestinian Red Crescent rescue service said another Gaza City hospital, Al-Quds, is “no longer operational” because it has run out of fuel with 6,000 people trapped there. Gaza’s sole power plant was forced to shut down a month ago, and Israel has barred fuel imports, saying Hamas would use them for military purposes.

One woman fleeing northern Gaza, Fedaa Shangan, said she’d had a cesarean section at Al-Quds: “The wound is still fresh.” She said the Israeli army near the hospital “did not care about the presence of patients, children, women and the elderly. They did not care about anyone.”

Alarm was growing. “We do not want to see a firefight in a hospital where innocent people, helpless people, people seeking medical care are caught in the crossfire,” President Joe Biden’s national security adviser, Jake Sullivan, told ABC’s “This Week.”

“Decisive international action is needed now to secure an immediate humanitarian cease-fire and prevent further loss of life” amid attacks on health care, the U.N. regional directors of the World Health Organization and others said in a statement, adding that more than half of Gaza’s hospitals are closed.

Muhammed Zaqout, director of hospitals in Gaza, said the Health Ministry has been unable to update the death toll since Friday as medics are unable to reach areas hit by Israeli bombardment. “The situation is extremely dire,” he said.

About 2.3 million Palestinians remain trapped in the besieged territory.

Netanyahu has said the responsibility for any harm to civilians lies with Hamas. Israel has long accused the group, which operates in dense residential neighborhoods, of using civilians as human shields.

Evacuation windows, but no pauses

The U.S. has pushed for temporary pauses that would allow for wider distribution of badly needed aid to civilians in the besieged territory, where conditions are increasingly dire.

But Israel has only agreed to brief daily periods during which civilians can flee the area of ground combat in northern Gaza and head south on foot along two main roads. Israel continues to strike what it says are militant targets across southern Gaza, often killing women and children.

Dozens of wounded people, including children, were brought to a hospital in Khan Younis after an Israeli airstrike demolished a building in the southern town. Hospital officials said at least 13 were killed.

The war has displaced over two-thirds of Gaza’s population, with most fleeing south. Egypt has allowed hundreds of foreign passport holders and medical patients to exit through its Rafah crossing, as well as the entry of a small amount of humanitarian aid.

Jordanian Foreign Minister Ayman Safadi said on X, formerly Twitter, that he asked European Union foreign policy chief Josep Borrell to apply the same “legal, moral grounds” for EU support of Ukraine to “define its stand on Israel’s war crimes.”

More than 11,000 Palestinians, two-thirds of them women and minors, have been killed since the war began, according to the Health Ministry in Gaza, which does not differentiate between civilian and militant deaths. About 2,700 people have been reported missing and are thought to be trapped or dead under the rubble.

At least 1,200 people have been killed on the Israeli side, mostly civilians killed in the initial Hamas attack. Forty-six Israeli soldiers have been killed in Gaza since the ground offensive began.

About 250,000 Israelis have been forced to evacuate from communities near Gaza, where Palestinian militants are still firing barrages of rockets, and along the northern border with Lebanon.