An Israeli air strike hit tents housing displaced Palestinians in the southern area of Khan Younis, killing at least nine people, including children and women, civil defence spokesman Mahmoud Bassal told AFP.

The Palestinian Red Crescent also confirmed the toll, saying 11 others were wounded in the strike and were taken to Nasser Hospital.

A second air strike killed five people, including children, and injured about 22 when "Israeli warplanes hit Fahad Al-Sabah school", which had been turned into a shelter for "thousands of displaced people" in the Al-Tuffah district of Gaza City, Bassal said.

The dead and injured were taken to Al-Ahli Arab Hospital, he added.

In recent months, the Israeli occupation army has struck several schools-turned-shelters killing hundreds of displaced and carried out an assault in the Jabalia area of northern Gaza described by health workers as a "genocide within a genocide."

Israeli forces also killed several people in southern Gaza's Rafah, alleging they were resistance fighters, but did not provide evidence to support the claim.

Israel's war on Gaza has killed at least 43,508 people, mostly women and children, according to the territory's health ministry that the United Nations considers to be reliable.

The UN rights office reconfirmed on Friday that at least 70 percent of those killed in Gaza since October last year are women and children.

*This story was edited by Ahram Online.