The Prime Minister has declined to say if he believes Israel's actions in Gaza are "criminal", as a tentative ceasefire takes effect.
Speaking on BBC Breakfast this morning, Mr Cameron said UN Secretary- General Ban Ki-moon had been right to condemn an Israeli strike near a UN-run school in Gaza as "a moral outrage and a criminal act".
But he stopped short of using the same language himself, insisting:
I think the UN is right to speak out in the way that it has, because international law is very clear that there must not be the targeting of civilians or the targeting of schools if that is what has happened.
Pressed on whether he regarded the attack as a "criminal act", Mr Cameron replied:
I'm not an international lawyer, so that's up to international lawyers. But international law is very, very clear that the use of force always has to be proportionate and civilians should not be targeted.We obviously do think it is appalling the loss of life that there has been.
From the start, though, we have also made the point that if the Hamas rocket attacks on Israel stop then that would be probably the fastest way to stop this conflict.
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.