At least 15 people, including children, were killed in an Israeli strike on a school in Khan Younis, according to Gaza Civil Defense.

The airstrike hit the Ahmed Abdul Aziz School near Nasser Hospital, within the humanitarian zone designated by Israel, the Gaza Civil Defense said.

The Israel Defense Forces has yet to comment on the strike.

Video verified by ABC News captured the chaos that unfolded when the strike caused a fire that spread throughout the top floor of the school. The footage showed a body on the ground near the school and captured people spilling out from a stairwell, including a woman carrying a child.

-ABC News' Samy Zyara

The director of Kamal Adwan Hospital in northern Gaza said Sunday night that his medical complex and its surroundings are being bombed "around the clock."

Dr. Hossam Abu Safia, the hospital's director, alleged that his facility is under siege by Israeli quadcopters or armed drones.

On Sunday, all the hospital generators were damaged in the bombings, Safia said. He said people who tried to go fix the generators were targeted.

"We are being killed daily in the hospital, and we are currently suffering direct bombardment without any prior warning," Safia said.

He said there were 50 patients at the hospital, including people who were injured within the hospital complex.

The Israel Defense Forces has not issued recent comments about attacks on Kamal Adwan Hospital.

-ABC News' Samy Zyara

Prime Minister Benjamin Netanyahu on Sunday night released a video in Hebrew addressing Israel's actions in Syria. He says he discussed this with President-Elect Trump "last night." He called it a "very friendly, very warm and very important conversation," and said they spoke about "the need to complete Israel's victory," as well as freeing the hostages in Gaza.

On Syria, Netanyahu said he has instructed the Israel Defense Forces "to thwart potential threats from Syria, and to prevent terrorist elements from taking over near our border." He also said the IDF's airstrikes in Syria have destroyed "capabilities that the Assad regime had built over decades," as well as the "arms supply routes from Syria to Hezbollah."

Netanyahu said Israel has "no interest in confronting Syria" but also said Israel will continue to act to stop Hezbollah from rearming "as much as necessary, in every arena and at any time."

-ABC News' Bruno Nota

The USS Harry S. Truman aircraft carrier strike group has arrived in the Middle East, according to U.S. Central Command.

The move from the Mediterranean was planned before the fall of the Assad regime in Syria, a U.S. official told ABC News.

The Truman replaces the USS Abraham Lincoln, which left the region last month.

-ABC News' Matt Seyler