Israel-Gaza updates: IDF says it exposed Hamas tunnel under Shifa Hospital

Dozens of people were killed on Saturday in air strikes on a refugee camp in Gaza, according to the Hamas-run Gaza Health Ministry.

At least 50 people were killed in an Israeli strike on the al-Fakhouri school in the Jabalia refugee camp, the health ministry said.

Another Israeli strike on a separate building in the camp killed 32 people -- including 19 children -- all from the same family, according to the health ministry.

ABC News has not been able to independently verify the claims and those numbers have yet to be corroborated.

The school, which is run by the United Nations Relief and Works Agency for Palestine Refugees (UNRWA), is currently serving as a shelter for thousands of displaced Palestinians, the agency said.

The commissioner general of UNRWA said Saturday he had received footage of "scores of people killed and injured" at the school.

The Israel Defense Forces said in a statement it had received reports of an "incident in the Jabalia region," which is under review.

"Despite the challenges posed by terrorists operating within civilian areas in Gaza, the IDF is committed to international law including taking feasible steps to minimize harm to civilians," the statement said.

In an opinion piece published by the Washington Post on Saturday, President Joe Biden drew similarities between the conflicts involving President Vladimir Putin in Ukraine and the terrorist group Hamas in the Middle East and outlined how his administration is addressing both.

"Both Putin and Hamas are fighting to wipe a neighboring democracy off the map. And both Putin and Hamas hope to collapse broader regional stability and integration and take advantage of the ensuing disorder," Biden wrote. "America cannot, and will not, let that happen. For our own national security interests -- and for the good of the entire world."

Biden reiterated his support for Israel but also acknowledged the ongoing suffering taking place in Gaza and the need for a two-state solution.

"A two-state solution -- two peoples living side by side with equal measures of freedom, opportunity and dignity -- is where the road to peace must lead," Biden wrote. "Reaching it will take commitments from Israelis and Palestinians, as well as from the United States and our allies and partners. That work must start now."

The president laid out principles to establish the future of the Palestinians post-war that include no reoccupation, no blockades, no reduction of territory, and the reunification of Gaza and the West Bank.

Biden said his administration is still diligently working to free the remaining hostages and that he is still pushing for humanitarian pauses "to permit civilians to depart areas of active fighting and to help ensure that aid reaches those in need."

-ABC News' Tia Humphries

Patients and doctors evacuated the Al-Shifa hospital on Saturday, after the Hamas-run Gaza Health Ministry claimed Israel forced them to leave. The IDF released a statement denying it ordered the evacuation, but in a Friday briefing another spokesperson said the IDF was urging anyone left in Al-Shifa hospital to leave and that it hoped it would take place in the "next few hours."

Doctors described their exodus from the hospital to ABC News, with Dr. Ahmed Mokhallalati -- who is still in the hospital -- saying "all critical ICU patients have died. The situation is terrifying."

"Today early in morning people were forcefully evacuated from the hospital, with absolutely no plan of evacuation of the patients and the medical staff. Most of the civilians together with most of the staff left the hospital," Mokhallalati said.

Mokhallalati said there are around 300 patients, who cannot move, and less than 50 medical staff still in the hospital.

"There are still 33 premature babies in the hospital -- one baby died yesterday, and two babies were taken by their parents to evacuate with them. There is only one neonatologist and one nurse with them," he added. The Israelis have provided only three transport incubators for 33 babies. So, if they tell us 'you have to evacuate now,' I have no idea how to evacuate them."

Dr. Adnan Al-Barash, head of the orthopedic department at Al-Shifa Hospital, told ABC News that the "Israeli army forced us to leave the hospital at gunpoint."

"The path for us to walk was set out among the tanks, we had elderly, wounded… The scene was very tragic and sad," Al-Barash said.

"We went out between the tanks, and we could not get the wounded out on the broken roads and we could not move wheelchairs for the wounded," he added.

-ABC News' Dragana Jovanovic and Zoe Magee

In the Gaza Strip, at least 12,300 people have been killed and over 30,000 others have been injured, according to the Hamas-run Gaza Health Ministry.

The United Nations released a statement saying many were killed in a UNRWA school sheltering displaced people.

"Receiving horrifying images & footage of scores of people killed and injured in another UNRWA school sheltering thousands of displaced in the north of the Gaza Strip. These attacks cannot become commonplace, they must stop. A humanitarian ceasefire cannot wait any longer," said Philippe Lazzarini from UNRWA.

-ABC News' Nasser Atta