Israel-Gaza updates: Hamas military chief target of strike that killed 90 people

In the last 24 hours, 52 people have been killed in Gaza and another 208 people have been injured, the Hamas-run Gaza Ministry of Health said.

The Israel Defense Forces said over the last day its forces have killed terrorists in areas in southern Gaza, central Gaza and northern Gaza.

The IDF said one of the counterterrorism operations overnight targeted "terrorists who were operating inside UNRWA's Headquarters."

"After a defined corridor was opened to facilitate the evacuation of civilians from the area, IDF troops conducted a targeted raid on the structure, eliminated terrorists in close-quarters combat, and located large amounts of weapons," the IDF said.

-ABC News’ Jordana Miller

The Israel Defense Forces struck Syrian military infrastructure on Wednesday, the military said.

"A short while ago, IDF tanks and artillery struck military infrastructure that was used by the Syrian military, which violated the Disengagement Agreement between Israel and Syria (1974) in the buffer zone," IDF said on messaging app Telegram.

Israel added that it held the Syrian military "responsible."

"The IDF holds the Syrian military responsible for all activities occurring within its territory and will not allow any attempts to violate Israeli sovereignty," the IDF said.

-ABC News' Kevin Shalvey

At least 30 people were killed and 70 others were injured in an Israeli strike on a school housing displaced people in Gaza, the apparent fourth time it has done so within the last four days.

The Israel Defense Forces said they were targeting Hamas and other militants in all of the strikes and the IDF is looking into Tuesday's strike. Dozens of people were reported killed in the strikes -- including women and children.

One child told ABC News he lost his father, cousin and two uncles in Tuesday's strike. He broke down as he described what happened, saying was the only survivor.

The U.N.'s Human Rights Office said this week they were "appalled" to see a new round of evacuation orders issued throughout the strip, including to "where IDF military operations are ongoing and where civilians continue to be killed and injured." The U.N. said nowhere is safe in Gaza.

-ABC News' Matt Rivers, Victoria Beaule and Guy Davies

Amid ongoing Israel Defense Forces' operations in Gaza City, 50 people were killed and another 130 were injured in the last 24 hours, according to the Hamas-run Gaza Ministry of Health.

Israeli forces continue to operate in Gaza City, specifically in the Shejaiya neighborhood, the IDF confirmed in two separate releases issued Tuesday.

-ABC News' Jordana Miller and Diaa Ostaz