Doctors Without Borders said 22 of its staff members -- all foreign nationals -- crossed into Egypt from Gaza via the Rafah crossing on Wednesday.

A new team of workers "is ready to enter Gaza as soon as the situation allows," Doctors Without Borders said. "Meanwhile, many of our Palestinian colleagues continue to work and provide lifesaving care in hospitals and across the Gaza Strip, while the most basic protections for hospitals and medical personnel are not guaranteed."

"We reiterate our call for an immediate cease-fire," the organization said. "Critically needed humanitarian supplies and staff must be allowed into Gaza where hospitals are overwhelmed and the healthcare system is facing total collapse."

Gaza's Jabalia refugee camp, the most populous refugee camp in the region, was hit by a second airstrike on Wednesday, according to the Hamas-run Gaza Health Ministry.

The Israel Defense Forces confirmed that on Wednesday, "based on precise intelligence, IDF fighter jets struck a Hamas command and control complex" in Jabalia, and that Hamas fighters were killed in the strike.

"Hamas deliberately builds its terror infrastructure under, around and within civilian buildings, intentionally endangering Gazan civilians," the IDF said. "The IDF has been urging Gazans in this neighborhood to evacuate as part of its efforts to mitigate harm to civilians. The IDF continues to call on all residents of northern Gaza and Gaza City to evacuate southwards to a safer area."

The IDF also took responsibility for the first strike on Tuesday, saying the blast killed a Hamas official who the IDF claimed was one of the leaders of the Oct. 7 attack on Israel.

The United Nations Human Rights Office said, "Given the high number of civilian casualties & the scale of destruction following Israeli airstrikes on Jabalia refugee camp, we have serious concerns that these are disproportionate attacks that could amount to war crimes."

Seventy-six injured Gazan residents have crossed from Gaza into Egypt on Wednesday, hours after the Rafah border crossing opened for the first time since the Israel-Hamas conflict began on Oct. 7, according to Palestinian Rafah Crossing spokesman Wael Abu Omar.

The World Health Organization said it's working with officials in Egypt to help establish "a comprehensive triage, stabilization, and medical evacuation system" and "ensure that psychological trauma support services are available to patients."

At least 335 foreign passport holders -- including dual nationals and foreigners -- also crossed from Gaza into Egypt on Wednesday, he said.

As the humanitarian crisis in Gaza worsens, 51 aid trucks crossed the border Wednesday to head into Gaza, he said. A total of 268 aid trucks have now entered Gaza.

President Joe Biden posted on social media on Wednesday confirming that the U.S. "secured safe passage for wounded Palestinians and for foreign nationals to exit Gaza."

"We expect American citizens to exit today, and we expect to see more depart over the coming days," Biden wrote.

Five American aid workers are among the foreign nationals who crossed the Rafah border from Gaza into Egypt on Wednesday, according to the Palestinian Children's Relief Fund.

A Rafah crossing spokesman said at least 335 foreign passport holders -- including dual nationals and foreigners -- have crossed from Gaza into Egypt.

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.