President Joe Biden and French President Emmanuel Macron welcomed the rescue of the hostages at a press briefing Saturday.

Biden welcomed the safe return of four hostages from Gaza, pledging that the United States will not stop working until all hostages are home.

"I want to echo President Macron’s comments welcoming the safe rescue of four hostages that were returned to their families in Israel. We won't stop working until all the hostages come home and a ceasefire is reached. That is essential to happen,” Biden said.

President Macron spoke before President Biden, also celebrating the news.

“In Gaza, we want to attain the immediate liberation of hostages and we can only welcome the liberation of four hostages by the Israeli army. We want to achieve the immediate ceasefire and open up the prospect of a political solution which is the only one that can bring about a fair and lasting peace and meet the security of concerns of both people,” Macron said.

“And that is why we are supporting the comprehensive proposal of the United States of America,” he added, calling on Israel to do more to assist humanitarian aid to Rafah, calling the situation “unacceptable.”

-ABC News’ Molly Nagle and Michelle Stoddart

At least 150 Palestinians were killed in Israeli bombing targeting Nuseirat, in central Gaza, Saturday, according the Ministry of Health.

One video verified by ABC News shows about a dozen bodies lying on the street, covered in blood and surrounded by rubble.

Others show people fleeing Nuseirat market as smoke fills the background, and people arriving at the hospital in droves, carrying wounded people and children.

Al Aqsa Martyrs Hospital says it received 55 bodies Saturday amid the Israeli raid on central Gaza, calling on people to come to donate blood, according to a spokesperson.

The hospital is overcrowded and cannot accommodate any more injured people, it said.

“We call on the international community and UN organizations to intervene to stop this brutal aggression,” the hospital said in a statement.

-ABC News’s Victoria Beaule

At least 47 Palestinians have been killed and dozens others were wounded in Central Gaza Saturday amid ongoing Israeli raids in Nuseirat, according to the Hamas-run Gaza Health Ministry.

A number of victims are still under the rubble and on the roads, with ambulance and civil defense crews unable to reach them.

"The occupation forces penetrating into the Central Governorate are committing a massacre against citizens in the Nuseirat camp, as a result of which many martyrs and wounded were transported to Al-Aqsa Martyrs Hospital," the Health Ministry said.

At least 36,801 Palestinians have been killed and 83,680 have been wounded since Oct. 7, according to the Gaza Health Ministry.

Videos obtained by ABC News from the hospital show dozens of people being brought in and lining the floors of the Al Aqsa Martyrs Hospital.

-ABC News' Samy Zyara and Nasser Atta

A weapon used in a strike on a UNRWA school sheltering displaced people on June 6 appears to be U.S.-made, three munitions experts told ABC News.

Journalist Emad Abu Shawiesh captured video of weapons fragments at the UNRWA al Sardi school building in Nuseirat in Gaza on June 6.

The weapon fragments seen in the video are consistent with the nose section of a U.S.-made GBU-39 "Small Diameter Bomb," Trevor Ball, a former U.S. Army explosive ordinance disposal specialist, told ABC News.

The GBU-39 also appeared to have been employed in a deadly strike on May 26 in Rafah, Gaza, according to Ball and another munitions expert, who asked not to be named due to the sensitivity of the issue.

Mark Hiznay, an associate director with the Crisis, Conflict and Arms Division of Human Rights Watch, told ABC News the image shows the remnants of a GBU-39.

N.R. Jenzen-Jones, a director at the consultancy Armament Research Services, said the image was consistent with the Small Diameter Bomb series.

“Given what we know about the IDF arsenal and munitions used in previous strikes, the remnants are most likely from a GBU-39 SDB and include a portion of the nose (forward section) of the bomb,” Jenzen-Jones said, adding that other munitions could have been used in the strike, which he had not yet assessed in detail.

-ABC News Chris Looft