Qatari mediators said on Sunday talks on a deal that would free some of the hostages were progressing, held up only by “very minor” practical challenges, though neither details nor a timeline were provided, and Israel and Hamas have said little.

An Israeli strike on the Indonesian Hospital near northern Gaza’s Jabilia refugee camp – the territory’s largest – killed 12 people, including patients, and wounded dozens more, the Gaza health ministry said on Monday.

Indonesia’s Foreign Minister Retno Marsudi on Monday condemned the attack.

“The attack is a clear violation of international humanitarian laws. All countries, especially those that have close relations with Israel, must use all their influence and capabilities to urge Israel to stop its atrocities,” she said in a statement.

An Agence France-Presse journalist saw columns of smoke rising from Jabilia on Sunday, one day after a health official said more than 80 people had been killed in twin strikes there, 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.

Israel’s military has said Jabilia is among the areas of focus as they “target terrorists and strike Hamas infrastructure”.

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

The violence in Jabilia was the latest to draw strong condemnation from Arab and other governments.

Twenty-eight premature babies arrived in Egypt on Monday, the World Health Organization (WHO) said, after they were evacuated from Gaza’s largest hospital.

The infants were evacuated Sunday from the al-Shifa hospital, which the WHO has described as a “death zone” as Israel seeks to uncover what it says are Hamas bases in tunnels underneath the facility.

An initial 31 babies were reported evacuated from al-Shifa, but three remained behind to continue receiving treatment the WHO said.

On Monday foreign ministers from the Palestinian Authority, Egypt, Saudi Arabia, Jordan and Indonesia held meetings on the war in Beijing, where Chinese Foreign Minister Wang Yi said the world must “act urgently” to stop the “humanitarian disaster” in Gaza.

“The situation in Gaza affects all countries around the world, questioning the human sense of right and wrong and humanity’s bottom line,” Wang told the visiting diplomats.

Six weeks into the war, Israel is facing intense international pressure to justify the bloody toll.

Israeli officials have warned a “window of legitimacy” for the war to rout Hamas may be closing.

Israel has repeatedly claimed that al-Shifa and tunnels beneath it double as a base for Palestinian militants, a charge Hamas and hospital administrators deny.

“We have not yet located both of these hostages,” army spokesman Daniel Hagari told reporters.

One clip showed a man in shorts and a pale blue shirt being dragged into an entrance hall by five men, at least three of whom were armed.

In a second clip, an injured man in underwear is wheeled in on a gurney by armed men as several others wearing blue hospital scrubs look on.

The footage could not be immediately independently verified.

Israel also accused the Palestinian militant group of executing 19-year-old Israeli soldier Noa Marciano at al-Shifa and presented images of what it said was a 55-metre (180-feet) tunnel under the hospital.

Over the weekend, hundreds of people fled al-Shifa hospital on foot as loud explosions were heard around the complex.

Israel has vowed to eradicate Hamas and has refused to heed calls for a ceasefire before all the captives are released.

The bodies of two female hostages, including the soldier, were recovered in Gaza, the Israeli military said last week.

Four abductees have so far been released by Hamas and a fifth rescued by troops.

Qatar’s prime minister said efforts to bring hostages “safely back to their homes” in return for a temporary ceasefire was now within reach, raising hopes that Israeli, American or other captives could soon be free.

“I’m now more confident that we are close enough to reach a deal,” said Mohammed bin Abdulrahman Al Thani, adding that only “minor” practical details remained unresolved.

Even as fighting raged on the ground, Israel’s ambassador to the United States, Michael Herzog, said in an interview on ABC’s This Week that Israel was hopeful a significant number of hostages could be released by Hamas “in coming days”.

Additional reporting by dpa, Reuters