The Rafah border crossing between Gaza and Egypt opened again on Monday, permitting 559 foreign passport holders as well as Egyptians to cross through to Egypt, a Rafah border crossing official said.

Four injured or sick Palestinians and five of their family members also crossed into Egypt, the official said.

Doctors in the war-torn Gaza Strip are appealing for help from the international community as hospitals run out of life-saving supplies amid Israel's bombardment.

Dr. Hatem Daher, who runs the neo-natal department at Nasser Hospital in Khan Younis in south Gaza, told ABC News that the situation there "is bad."

"There is the difficulty in getting drinking water and washing water, especially in our natal ICU because of the difficulty of getting the fuel for our generator," Daher said.

Daher noted that the situation at the strip's largest medical complex, Al-Shifa Hospital in Gaza City, is even worse. Several doctors from Shifa are now working in Daher's hospital, he said.

"Our colleagues in Shifa Hospital describe a disaster there," Daher told ABC News. "No electricity, no oxygen, no drugs."

Daher warned that dozens of premature babies at Shifa are on the brink of death.

"Because they need incubator, they need electricity, they need oxygen, they will die. All of them," he said. "All of them will die. So, we call this emergency -- emergency call for all world, for all organizations -- WHO, UNICEF, Red Cross, anybody [who] can help these children."

-ABC News' Sami Zayara

The Palestinian Red Crescent Society said Monday that heavy bombardment and explosions around Al-Quds Hospital, the second-largest hospital in the Gaza Strip, is hindering the evacuation of patients and medical staff trapped inside.

A convoy of vehicles accompanied by the International Committee for Red Cross that had set off from southern Gaza toward central Gaza to secure the evacuation of Al-Quds Hospital was forced to turn around on Monday, according to the Palestinian Red Crescent Society.

"The convoy was forced to return due to the dangerous conditions in the Tal al-Hawa area, where the hospital is located, in light of the continuing shelling and shooting, and the medical staff, patients and their companions are still trapped inside the hospital without food, water or electricity," the Palestinian Red Crescent Society wrote in a post on X, the social media platform formerly known as Twitter.

-ABC News' Ayat Al-Tawy and Morgan Winsor

The Israel Defense Forces said Monday morning that its "troops are continuing to conduct raids" on the outskirts of the Al-Shati refugee camp in the Gaza Strip, "targeting terrorist infrastructure located in central governmental institutions in the heart of the civilian population, including schools, universities, mosques, and residences of terrorists."

The IDF alleged that "terror infrastructure" belonging to Gaza's militant rulers, Hamas, was "deliberately located inside civilian structures" within the area, including inside the Al-Quds University and the Abu Bakr mosque.

"The troops uncovered a section of the mosque which housed a large number of explosive devices and flammable materials," the IDF said in a statement. "During the activity, the troops seized dozens of weapons, military equipment, and operational plans belonging to the Hamas terrorist organization."

The IDF also alleged that its ground troops discovered "a large number of weapons" inside a children's bedroom within the home of a senior official of Palestinian Islamic Jihad, another militant group based in Gaza.

Since Oct. 7, in response to Hamas' deadly attack on Israel, the IDF said its aircraft and ground forces have conducted 4,300 strikes on Gaza, hitting "hundreds of anti-tank missile launch posts, approximately 300 tunnel shafts, approximately 3,000 terrorist infrastructure sites, including over 100 structures rigged with explosives, and hundreds of Hamas command and control centers."

-ABC News' Morgan Winsor

Israeli ground troops continued to carry out a raid on the largest hospital in the Gaza Strip for a second day.

A spokesperson for the Israel Defense Forces told ABC News that, as of 1 p.m. local time on Thursday, soldiers were still inside Al-Shifa Hospital in Gaza City, some 34 hours after launching the raid.

The IDF spokesperson also confirmed that they found explosives inside the medical complex.

The IDF alleges that Hamas has placed its command centers under Al-Shifa and other hospitals in Gaza and is deliberately sheltering behind Palestinian civilians -- claims that the militant group denies.

-ABC News' Dana Savir and Morgan Winsor