Hamas says an Israeli bombing of a house in Gaza City last night was an attempt to assassinate its military leader, Mohammed Deif.
There was no official confirmation from Israel, which has targeted Deif in air strikes at least four times since the mid-1990s, holding him responsible for the deaths of dozens of its citizens in suicide bombings.
"I am convinced that if there was intelligence that Mohammed Deif was not inside the home, then we would not have bombed it," Yaakov Perry, Israel's science minister and former security chief, told Army Radio.
A Hamas official said that Deif does not use the house.
Three bodies were pulled from the rubble. Hospital officials identified them as Deif's wife, his seven-month-old son and a 20-year-old man.
There have been two days of quiet in Gaza. No rockets or missiles, no more destroyed houses, no more ambulance sirens screaming.
A three-year-old girl has been rescued from Gaza and brought to London for life-saving heart surgery.
A small team of NHS doctors and surgeons is travel to Gaza to set up facilities and establish how best to use specialists and equipment.