The Palestinian Red Crescent said an Israeli air strike on a Gaza school killed at least 28 people Thursday.
"Palestine Red Crescent teams responded to 28 fatalities and 54 injuries following the Israeli occupation army's targeting of Rafida School," the organisation said, referring to a school in Deir el-Balah.
Gaza's health ministry issued the same death toll in a statement.
Thursday's attack was the latest in a series of Israeli strikes on school buildings housing displaced Palestinians in Gaza, where fighting has raged for more than a year.
On 26 September, at least 15 people were killed in another school-turned-shelter strike in northern Gaza's Jabalia camp, according to Gaza civil defence agency.
The Israeli military is currently engaged in an intense operation in Jabalia.
A local source from Jabalia who wished to remain anonymous for safety reasons told AFP Thursday that Israeli aircraft struck the city's Al-Yemen Al-Saeed Hospital, where displaced Gazans had sought refuge.
The source said that "among the martyrs pulled from the rubble of two destroyed rooms were dismembered bodies, cases of amputations, and burned corpses".
Ongoing Israeli military operations in Jabalia have killed at least 140 people over the past six days, according to Gaza's civil defence agency.
At least 42,065 Palestinians, a majority of them civilians, have been killed in Israel's military campaign in Gaza since the war began, according to data provided by the health ministry.