Israeli strikes on refugee camps in northern Gaza's Jabalia town on Friday killed at least 30 Palestinians including children, said Gaza's civil defence agency.
The agency's spokesman Mahmud Bassal said that a strike that occurred before 9:40 pm local time (1840 GMT) had left 12 dead, including women and children in the town.
Bassal said that 14 people were still missing and likely trapped under the rubble.
Several strikes on eight schools in the camp that were serving as shelters for displaced Palestinians killed at least 18 people, the agency's northern Gaza director Ahmad al-Kahlut said.
In total, the day's strikes left at least 110 injured, according to figures provided by the agency.
The Israeli military did not respond to questions about the strikes on schools in Jabalia camp, reported AFP.
Last weekend, the Israeli army announced it had surrounded the Jabalia area and issued evacuation orders. Several experts have suggested that Israel is aiming at ethnically cleansing the Palestinians of the region.
Israel has so far killed at least 42,000 people including 17,000 children, more than 11,000 women, 1000 health care professionals and more than 174 journalists since the beginning of its recent war on Gaza. The Israeli military has targetted and destroyed hospitals, schools and universities in Gaza as it bombarded the Palestinian territory by air and land, displacing almost all of its civilian population of 2.4 million people at least once in the past year.
(With inputs from AFP)