The strikes hit the Tabeen school in Gaza City, including the mosque inside it, during dawn prayers.
Hamas denied that there was a command center in the school and in a statement, called the strike a "heinous massacre."
The interior of the Tabeen school after an Israeli strike during dawn prayers on Saturday.
According to the UN, 477 out of 564 schools in Gaza have been directly hit or damaged in the war.
The civil defense, he added, continued to suffer from severe shortages, "and are working with simple manual equipment, which has not enabled the teams to perform their duties effectively and save lives."
Persons:
Omar Al, Mohammed Al, Mogher, Ismail Haniyeh, Antony Blinken, Yoav Gallant, Matthew Miller, Blinken
Organizations:
Israel Defense Forces, NBC, UN, Getty, Gaza's Civil Defense, NBC News, National Hospital, United Nations, Qatari, Hamas, Israeli
Locations:
Gaza City, Gaza, AFP, Tehran, Beirut . American, Israel