ISRAEL’S military has said it is investigating “harm caused to civilians” from an air strike it launched in Gaza.
Palestinian medics said eight members of one family died in the strike, among them five children.
Israel said the attack targeted the home of Rasmi Abu Malhous, who it called a militant commander from the group Palestinian Islamic Jihad (PIJ).
It said no civilians were expected to be in harm’s way.
The attack in Deir al-Balah, in central Gaza, was the deadliest episode in a two-day exchange of fire between Israel and the Palestinian group.
It took place on Thursday, shortly before a ceasefire came into effect.
The missiles hit an open sandy area, obliterating what neighbours and relatives described to the BBC as flimsy tin-roofed buildings inhabited by 22 people – the families of two brothers.
There were conflicting local accounts about whether one of them may have been linked to Islamic Jihad.
The Israeli military originally insisted that the head of the family, who it said was killed, was a commander of a PIJ rocket-launching unit.
Israel now says the information about his identity is not certain and is being reviewed, the BBC’s UN correspondent Barbara Plett Usher reports from Gaza.
Islamic Jihad did not comment on whether Abu Malhous was a member.
Fighting flared after Israel killed a PIJ commander in the early hours of Tuesday.
Israel said the commander, Baha Abu al-Ata, was a “ticking bomb” who was behind a planned imminent attack and responsible for recent rocket-fire from Gaza.
More than 450 rockets and mortars were fired at Israel, and several waves of air strikes carried out on Gaza in two days of violence.
The fighting left 34 Palestinians dead and 111 injured, while 63 Israelis needed medical treatment.
Israel said 25 of the Palestinians killed were militants, including those hit while preparing to launch rockets.