A powerful Israeli air strike levelled a house in Gaza City late Friday, wounding 40 Palestinians, local emergency services said.
Witnesses said a drone fired two rockets at the two-storey property before an F16 warplane dropped a large bomb.
Emergency services told AFP that 40 people from the building and neighbouring buildings were wounded in the strike.
A witness at the site said the family had evacuated the building before the attack and that the injured came from neighbouring homes.
The air raid came shortly after Israeli Prime Minister Benjamin Netanyahu pledged that "Hamas will pay a heavy price" for a mortar attack from Gaza which killed a four-year-old Israeli boy.
*This story was edited by Ahram Online.