An Israeli airstrike hit a house in Gaza City on Saturday morning and killed 11 members of a single family, including women and children, Gaza's civil defence agency said.
"We have recovered the bodies of 11 martyrs, including four children and three women, after an Israeli airstrike hit the house of the Bustan family in eastern Gaza City," agency spokesman Mahmoud Bassal told AFP.
The strike took place near the Shujaiya school in the Al-Tuffah neighbourhood of Gaza City, he said.
"Rescuers are continuing to search for the missing," Bassal said.
The Israeli military had no immediate comment on the strike.
Bassal said Israeli forces carried out similar strikes in some other parts of Gaza overnight, killing at least 10 people.
Five people were killed in northwestern Gaza City when an airstrike hit a group of people near Dar Al-Arqam school, he said.
Three others were killed in a strike in the Al-Mawasi area of the southern Khan Younis governorate, where tens of thousands of displaced Palestinians have sought refuge, Bassal added.
Israel's war on Gaza has so far killed at least 41,118 people, according to the Palestinian enclave's health ministry. The UN human rights office says most of the dead have been women or children.
A Hamas-led 7 October attack on southern Israel resulted in the deaths of 1,205 people, mostly civilians, according to an AFP tally based on official Israeli figures.
Militants also seized 251 captives during the attack, 97 of whom are still held in Gaza, including 33 the Israeli military says are dead.