Gaza: The United Nations agency that looks after Palestinian refugees said it had found a cache of rockets at one of its schools in the Gaza Strip and deplored those who had put them there.

United Nations Relief and Works Agency (UNRWA) spokesman Chris Gunness condemned those responsible for placing civilians in harm's way by storing the rockets at the school but he did not specifically blame any party.

"We condemn the group or groups who endangered civilians by placing these munitions in our school. This is yet another flagrant violation of the neutrality of our premises. We call on all the warring parties to respect the inviolability of UN property," Mr Gunness said.

Israel has claimed throughout the three-week conflict that Hamas and other Islamic militant groups have used schools and other civilian sites to store weapons, making them legitimate targets.