Israeli troops withdrew Monday from Gaza’s Al-Shifa hospital, leaving behind bodies and massive destruction at the end of a two-week raid inside the enclave's largest medical facility.

The military has described the raid as one of the most successful of the nearly six-month war and claimed to have killed at least 200 members of Palestinian resistance groups.

However, it came at a time of mounting frustration in Israel, with tens of thousands protesting against Prime Minister Benjamin Netanyahu on Sunday and demanding he do more to bring home dozens of hostages held in Gaza. It was the largest anti-government demonstration since the start of the war.

The weeklong fighting showed Hamas could still put up resistance even in one of the hardest-hit areas. Israel had earlier claimed to have largely dismantled Hamas in northern Gaza and withdrew thousands of troops late last year, leaving a security vacuum that has made it difficult to deliver desperately needed humanitarian aid.

The military said that among those killed were senior Hamas operatives and other members who allegedly had regrouped there after an earlier raid in November and that it seized weapons and valuable intelligence.

The U.N. health agency said more than 20 patients died and dozens were put at risk during the raid, which brought even further destruction to a hospital that had already largely ceased to function.

Israel accuses Hamas of using hospitals for military purposes without conclusive evidence and has raided several medical facilities. Health officials in Gaza deny those allegations.

Critics accuse the army of recklessly endangering civilians and of decimating a health sector already overwhelmed with war-wounded. Palestinians say Israeli troops forcibly evacuated homes near Al-Shifa in downtown Gaza City and forced hundreds of residents to march south.

Rear Adm. Daniel Hagari, the top military spokesman, claimed Hamas and the smaller Islamic Jihad group had established their main northern headquarters inside the hospital.

He described days of close-quarters fighting and blamed Hamas for the destruction, saying some fighters had barricaded themselves inside hospital wards while others launched mortar rounds at the compound.

He said the troops had arrested some 900 suspected members during the raid and seized over $3 million in different currencies, as well as weapons.

Total destruction

He denied that any civilians had been harmed by Israeli forces, saying the army had evacuated more than 200 of the estimated 300 to 350 patients and delivered food, water and medical supplies to the rest, the military claimed.

Mohammed Mahdi, who was among hundreds of Palestinians who returned to the area, described a scene of "total destruction." He said several buildings had been burned down and that he had counted six bodies in the area, including two in the hospital courtyard.

Video footage circulating online showed heavily damaged and charred buildings, mounds of dirt that had been churned up by bulldozers and patients on stretchers in darkened corridors.

Another resident, Yahia Abu Auf, said army bulldozers had even plowed up a makeshift cemetery in Al-Shifa's courtyard.

"The situation is indescribable," he said. "The occupation destroyed all sense of life here."

At least 21 patients have died since the raid began, World Health Organization Director-General Tedros Adhanom Ghebreyesus posted late Sunday on X, formerly Twitter.

He said over a hundred patients were still inside the compound, including four children and 28 critical patients. He also said there were no diapers, urine bags or water to clean wounds, and that many patients suffered from infected wounds and dehydration.

The military had previously raided Al-Shifa in November, after saying Hamas maintained an elaborate command and control center inside and beneath the compound. It revealed a tunnel running beneath the hospital that led to a few rooms, as well as weapons it said it had confiscated from inside medical buildings, but nothing on the scale of what it had alleged prior to that raid.

The war was triggered by the Oct. 7 Hamas incursion into southern Israel that killed around 1,160 people, mostly civilians, and taking around 250 people hostage.

Israel responded with a brutal air, land and sea offensive that has killed at least 32,782 Palestinians, mostly women and children, according to Gaza's Health Ministry.

The war has displaced most of the territory's population and driven a third of its residents to the brink of famine. Northern Gaza, where Al-Shifa is located, has suffered vast destruction and has been largely isolated since October, leading to widespread hunger.

Even as Israel has turned its focus to other parts of Gaza this year, its troops have battled resistance in the north on several occasions and the two weeks of heavy fighting around Al-Shifa highlighted the staying power of the armed groups.

Netanyahu has vowed to keep up the offensive until Hamas is destroyed and all of the hostages are freed. He says Israel will soon expand ground operations to the southern city of Rafah, where some 1.4 million people – more than half of Gaza's population – have sought refuge.

But he faces mounting pressure from Israelis who blame him for the security failures of Oct. 7 and from some families of the hostages who blame him for the failure to reach a deal despite several weeks of talks mediated by the United States, Qatar and Egypt. Allied countries, including main backer the United States, have warned him against an invasion of Rafah.

Hamas and other groups are still believed to be holding some 100 hostages and the remains of 30 others, after freeing most of the rest during a cease-fire last November in exchange for the release of Palestinians imprisoned by Israel.