Three senior Hamas military commanders have been killed in Israeli air strike in the Gaza Strip, the Islamist militant group said.
Hamas named the men as Mohammed Abu Shammala, Raed al-Attar and Mohammed Barhoum and said they were killed in a bombing of a house in the southern town of Rafah.
The UN Security Council expressed "grave concern" at the resumption of hostilities in Gaza between Israel and Palestinians and called upon the parties to resume negotiations to urgently reach a "sustainable and lasting ceasefire."
The 15-member Security Council also "called upon the parties to prevent the situation from escalating and to reach an immediate humanitarian ceasefire," said British UN Ambassador Mark Lyall Grant, president of the council for August.
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.