Israeli Prime Minister Benjamin Netanyahu vowed Monday that Israel will keep fighting despite international criticism, and said he has no plans to resign.

Netanyahu said Israel will not agree to a cease-fire, saying doing so would mean surrendering to Hamas.

Netanyahu implored the international community to back Israel, framing the war as a fight for civilization itself.

He said Hamas will continue to use civilians as human shields as long as the international community keeps blaming Israel for their deaths.

-ABC News' Matt Rivers

The United Nations Relief and Works Agency for Palestine Refugees said 63 of its staff members have been killed and at least 22 staffers have been injured since Oct. 7.

Ten have been killed in the last 72 hours.

Pvt. Ori Megidish, a female Israeli soldier who was kidnapped by Hamas on Oct. 7, was rescued during the Israeli military's ground operations overnight, the Israel Defense Forces said Monday.

She's now home with her family, the IDF said.

Editor's Note: An earlier IDF statement said a kidnapped female Israeli soldier was released, but later clarified that she was rescued.

The death of Shani Luk, a 23-year-old German-Israeli woman who was kidnapped by Hamas on Oct. 7, was confirmed by both the Israeli Foreign Ministry and the German government on Monday.

German Chancellor Olaf Scholz wrote on social media, "The news of Shani Louk's death is terrible."

"This shows the full barbarity behind the Hamas attack - who must be held accountable." Scholz said. "This is terror, and Israel has the right to defend itself."

Secretary of State Antony Blinken defended Israel's military actions against Hamas at a Friday news conference in Israel after meeting with Israeli leaders, saying, "This right to self-defense, indeed, this obligation to self-defense, belongs to every nation. No country could, or should, tolerate the slaughter of innocents."

Blinken said during his Friday meetings with Israeli leaders he viewed more footage from Hamas' Oct. 7 attack, describing the videos as "almost beyond the human capacity to process."

In one video, he said, a father at a kibbutz grabbed his two sons, who appeared about 10 or 11 years old, and pulled them from the house into a shelter.

The family was "followed seconds later by a terrorist who throws a grenade into that small shelter," Blinken said.

When the dad came stumbling out of the shelter, he was shot, Blinken said.

The sons then ran from the shelter into the house, crying, "Where's daddy?" he said.

The terrorist then "casually opens the refrigerator and starts to eat from it," Blinken said.

"It is striking, and in some ways, shocking, that the brutality of the slaughter has receded so quickly in the memories of so many. But not in Israel and not in America," he said.

After sharing details of the terror inflicted on Israeli children during the conflict, Blinken touched on the images of young Palestinian boys and girls pulled from the rubble of buildings.

"When I see that, when I look into their eyes through the TV screen, I see my own children," he said.