The warning came a day after the International Criminal Court (ICC) issued arrest warrants for Israeli Prime Minister Benjamin Netanyahu and former defense minister Yoav Gallant more than a year into the Gaza war.

The UN and others have repeatedly decried humanitarian conditions, particularly in northern Gaza where Israel said Friday it had killed two commanders involved in Hamas's Oct. 7, 2023 attack that triggered the war.

Gaza medics said an overnight Israeli raid on Beit Lahia and nearby Jabalia resulted in dozens killed or missing.

Marwan al-Hams, director of Gaza's field hospitals, told reporters all hospitals in the Palestinian territory "will stop working or reduce their services within 48 hours due to the occupation's [Israel's] obstruction of fuel entry".

World Health Organization (WHO) chief Tedros Adhanom Ghebreyesus said Friday he was "deeply concerned about the safety and well-being of 80 patients, including 8 in the intensive care unit" at Kamal Adwan hospital, one of just two partly operating in northern Gaza.

Late Thursday, the UN's humanitarian coordinator for the Palestinian territories, Muhannad Hadi, said: "The delivery of critical aid across Gaza, including food, water, fuel and medical supplies, is grinding to a halt."

He said that for more than six weeks Israeli authorities "have been banning commercial imports" while "a surge in armed looting" has targeted aid convoys.

 'Absurd and false'

Vowing to stop Hamas from regrouping, Israel on Oct. 6 began an air and ground operation in Jabalia and then expanded it to Beit Lahia.

Gaza's health ministry says the operation has killed thousands.

The UN says more than 100,000 have been displaced from the area, and an official told the Security Council last week that people "are effectively starving".

Issuing the warrants for Netanyahu and Gallant, the Hague-based ICC said there were "reasonable grounds" to believe they bore "criminal responsibility" for the war crime of starvation as a method of warfare, and crimes against humanity including over "the lack of food, water, electricity and fuel, and specific medical supplies".

A furious Netanyahu said: "Israel rejects with disgust the absurd and false actions and accusations made against it."

He said the judges were "driven by anti-Semitic hatred of Israel".

Palestinians mourn as the bodies of victims of an Israeli strike the previous night are brought to at Al-Ahli Arab hospital, also known as the Baptist hospital, in Gaza City on Nov. 22, 2024. (AFP/Omar Al-Qattaa)

On Friday, he thanked his Hungarian counterpart Viktor Orban for his show of "moral clarity" in inviting him to visit in defiance of the ICC warrant, which Orban branded "political".

Hungary currently holds the rotating EU presidency.

US President Joe Biden, whose country is Israel's top military supplier, called the warrants against Israeli leaders "outrageous", but other world leaders supported the court.

Irish Prime Minister Simon Harris said Netanyahu would be arrested if he set foot in the country.

Biden and French President Emmanuel Macron on Friday discussed efforts towards a ceasefire in Lebanon, the White House said. 

Warrant for Hamas chief

The ICC also issued a warrant for Hamas military chief Mohammed Deif, saying it had grounds to suspect him of war crimes and crimes against humanity over the attacks on Israel that sparked the war, and including "sexual and gender-based violence" against hostages.

Israel said it killed Deif in July, but Hamas has not confirmed his death.

On Thursday, a UN representative said an Israeli raid on Palmyra in Syria this week was "likely the deadliest" by Israel on the country so far. On Friday, a war monitor said the strikes killed 92 pro-Iran fighters.

Israel again bombed Gaza on Friday. In Gaza City, just south of Jabalia, one man who said he took his cousins to hospital after a strike urged "the world [...] to put an end" to the war.

Belal, who gave only his first name, said 10 members of his family had been killed.

At least 44,056 people have been killed in Gaza during more than 13 months of war, most of them civilians, according to figures from Gaza's health ministry which the United Nations considers reliable.

Medics of the World Health Organization (WHO) and the Palestinian Red Crescent prepare to start a convoy from the European Hospital in Khan Yunis south of Gaza to evacuate some patients and war-wounded from the besieged Palestinian territory on Nov. 20, 2024, amid the ongoing war between Israel and the Palestinian Hamas movement. (AFP/Eyad Baba)

Hamas triggered the war with the deadliest attack in Israeli history, which resulted in the deaths of 1,206 people, mostly civilians, according to an AFP tally of Israeli official figures.

The war expanded to Lebanon in late September when Israel escalated air strikes against Iran-backed Hezbollah and later sent ground troops into southern Lebanon, after nearly a year of tit-for-tat cross-border exchanges which Hezbollah said were in support of Hamas.

Lebanon says more than 3,580 people have been killed in the country, most of them since late September.

Israeli strikes again targeted Hezbollah's south Beirut stronghold and south Lebanon on Friday, the official National News Agency said.

Thousands of UN peacekeepers are based in southern Lebanon and have reported coming under attack numerous times, blaming both Israel and "non-state" actors.

On Friday, Italian Foreign Minister Antonio Tajani said Hezbollah was probably behind a rocket attack that lightly wounded four Italian peacekeepers.