The United Nations agency that looks after Palestinian refugees said on Tuesday 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 **t specifically blame any particular party. Israel has targeted a few UNRWA sites during fighting in the current 22-day-old campaign against Islamist militants in the Gaza Strip, and has in the past said the agency's property was used for hostile purposes. U.N. Secretary-General Ban Ki-moon last week expressed alarm at the discovery of 20 rockets at a vacant UNRWA school and at a**ther school a week before that.