An Israeli air strike killed six members of one family in Gaza City, according to local medics. The family's apartment was set on fire in the al-Sabra neighbourhood.
The brother of Firas al-Masri told the BBC that he died alongside his wife, Salsabeel, and their four children.
The Israeli military stated its target was a Hamas operative and that it was reviewing the attack's results.
Since a ceasefire took effect last October, Gaza's health ministry reports at least 1,168 Palestinians have been killed in Israeli attacks. Four Israeli soldiers have been killed in Palestinian attacks during the same period.
The UN human rights office condemned the recent intensification of strikes. Between July 13 and 20, at least 57 Palestinians, including 14 women and children, were killed in attacks on residential buildings and a tent camp.
A UN spokesman warned that the killing of civilians raises concerns of possible violations of international humanitarian law and war crimes.
The Israeli military has announced a series of recent attacks targeting members of Palestinian armed groups it says were involved in the October 7, 2023, Hamas-led attack on Israel, in which about 1,200 people were killed and 251 taken hostage.
Israel's subsequent military campaign in Gaza has resulted in over 73,290 deaths, according to the territory's health ministry.