David Cameron and Barack Obama have expressed "serious concern" at renewed hostilities in Gaza, calling for a lasting ceasefire to end the violence.
In a telephone call, the leaders condemned Hamas for firing rockets into Israel claiming they were "putting innocent people at risk".
The Prime Minister and US President said Israel had a right to defend itself but said its forces needed to show "restraint" and to take "utmost care" to avoid civilian casualties.
The comments came as fresh violence broke out following the end of a three-day ceasefire on Friday, with nine people reportedly killed in air strikes in Gaza.
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.