The U.S. announced $404 million in aid for Palestinian civilians in Gaza and the region, bringing the total amount of aid from the U.S. to over $674 million since the wore broke out, the State Department announced Tuesday.

"This new funding will provide essential support to vulnerable Palestinians in Gaza, the West Bank and the region, including food, safe drinking water, health care, protection, education, shelter, and psychosocial support," the State Department said. "We urge other donors to contribute to the humanitarian response in Gaza and the region, increase support to those affected by the conflict, and work together to find lasting solutions to the crisis."

United Nation human rights officials said they were "profoundly shocked" by the Israeli operation that freed four hostages in central Gaza over the weekend, adding that actions by both Israel and Hamas "may amount to war crimes."

"The manner in which the raid was conducted in such a densely populated area seriously calls into question whether the principles of distinction, proportionality and precaution -- as set out under the laws of war -- were respected by the Israeli forces," the U.N. Office of the High Commissioner of Human Rights, or OHCHR, said in a statement on Tuesday.

The rescue operation in a refugee camp in Nuseirat killed as many as 274 people, the Hamas-run Gaza Health Ministry said Monday. Hundreds of others were injured, the ministry said. Many of those injured and killed were Palestinian civilians, OHCHR said on Tuesday.

But OHCHR also said it was "deeply distressed" about the way the militant groups continue to hold hostages, "most of them civilians, which is prohibited by international law."

By holding those hostages in densely populated areas, Hamas militants are putting civilians and the hostages at risk, the agency said.

"All these actions, by both parties, may amount to war crimes," OHCHR said.

-ABC News' Joe Simonetti and Kevin Shalvey

At least 274 people were killed and another 698 were injured during Saturday’s Israeli rescue operation that saved four hostages from Hamas custody in Gaza, according to Gaza’s Hamas-controlled Ministry of Health.

Israeli special forces were disguised as Palestinian refugees looking for a place to live when they entered the buildings where hostages were being held in the rescue operation, two Israeli security sources told ABC News.

The hostages were rescued from two locations in Nuseirat, a camp that has become home to thousands of refugees who've fled fighting throughout Gaza.

-ABC News’ Morgan Winsor

The United Nations Security Council on Monday adopted a U.S. draft resolution urging Hamas to accept the latest cease-fire and hostage release deal.

Nate Evans, spokesperson for the U.S. mission to the United Nations, said in a statement ahead of the vote that the deal would enable a pause in fighting, the freeing of a number of hostages and an immediate surge in humanitarian assistance, among other things.

"Israel has accepted this proposal and the Security Council has an opportunity to speak with one voice and call on Hamas to do the same," Evans said. "Doing so would help save lives and the suffering of civilians in Gaza as well as the hostages and their families. Council Members should not let this opportunity pass by and must speak with one voice in support of this deal."

U.S. Ambassador Linda Thomas-Greenfield made a similar case just before the vote, saying every day the war goes on "needless suffering continues."

"Colleagues, after eight months of devastation and pain and trauma, what is needed now more than ever is for the fighting to end in a sustainable way," she said. "The United States and every single country in this chamber wants to see an immediate cease-fire with the release of hostages. We've heard those calls time and time again since Oct. 7. Now the opportunity is here. We must seize it."

Hamas said in a statement they "welcome" what was included in the U.N. Security Council resolution "regarding a permanent cease-fire in Gaza."

Israeli forces returned to Jenin, in the West Bank, on Thursday to conduct what they called a "13-hour counter-terror operation" that left three killed, two detained and multiple injured, according to the local Palestinian Red Crescent Society.

The youngest person killed was 19 and the oldest 70, according to the PRCS report.

Bulldozers were filmed in central Jenin, where UNRWA said there was heavy damage, as well as in the town of Qabatiya, south of Jenin, where the Israeli forces say they conducted a "pressure cooker" procedure on a house where they say two senior terrorists were staying.

Two suspects were killed, according to the IDF statement. The PRCS reports three killed and multiple people injured by shrapnel and beating.

The IDF reported two died in the operation.

-ABC News' Camilla Alcini