A school run by the United Nations in northern Gaza has been attacked, the UN confirmed on Saturday. A top UN official described it as a horrifying incident, CNN reported.Video from al-Fakhoura School in Jabalya, which was being used as a shelter for displaced people, showed bloodied bodies across a series of rooms on the two floors of the two-story building. Many women and children are among the dead.UN footageIn the video, one room appears to contain about a dozen bodies lying on the floor, covered in dust. Desks are strewn and smashed up and a huge hole can be seen in one of the rooms walls. In the building courtyard, a canopy roof across a metal structure appears to have been torn off, and debris is visible on the ground, as per CNN.A spokesperson for the United Nations Relief and Works Agency (UNRWA) Juliette Touma confirmed the incident. The total number of casualties remains unclear, she said, as information is still coming in.UNRWA runs the schools in Palestinian refugee camps and serves as the main UN relief agency in Gaza.Culprit unknownTouma could not confirm what caused the incident or who was responsible.UNRWA chief Philippe Lazzarini, who called the images horrifying in a post on X (formerly Twitter), said thousands of displaced people had been sheltering there at the time of the incident.The Israeli military is reviewing the incident, it told CNN but has made no further comment.Egypt and Qatar blames Israel Egypt and Qatar have already blamed Israels military campaign in the battered enclave for the incident. The Egyptian Foreign Ministry called it bombing and said it was the latest in a series of Israeli violations against civilians in Gaza.Qatar called on independent investigators from the United Nations to go to Gaza to examine what it described as the ongoing targeting of schools and hospitals, as per CNN.The incident comes the second time in twenty-four hours that a UNRWA school in northern Gaza has been hit, the agency said. Another school in Zaitoun was sheltering 4,000 people when it was struck multiple times on Friday, Touma told CNN.