Health officials in Gaza have appealed for fuel, medical supplies and food to be sent immediately to three hospitals in the north overwhelmed by the number of patients and injuries, Reuters reports.

At the Kamal Adwan Hospital, medics said they had to replace children in intensive care with more critical cases of adults badly wounded by Israeli airstrikes on a school sheltering displaced Palestinians in Jabalia on Thursday.

Kamal Adwan’s director, Hussam Abu Safiya, said in a video sent to media that the children had been moved to another division inside the facility, where they were being cared for. He said medical staff were exhausted and hospital supplies, including food, were badly depleted.

Israel said it sent about 30 truckloads of aid into northern Gaza on Friday, including food, water, medical supplies, and shelter equipment. However, Hamas and health officials say the aid has not been reaching the worst affected areas, including the three isolated towns.

Philippe Lazzarini, head of the UN Palestinian refugee agency UNRWA, said on X that the attack on the school was the third on a UNRWA facility this week, and that the agency had lost 231 team members in the past year of fighting.