Two UN organizations on Thursday urged Israel to end its security measures imposed on the Gaza Strip for more than three years. Marking the World's Humanitarian Day, World Food Program (WFP) and the Office for Coordination of Humanitarian Affairs (OCHA) said in a joint study that the Israeli measures have caused painful reality to Gaza population. "Since the end of 2008, the Israeli army had expanded the no-go zones," said the study, adding "22 Palestinians were killed because they approached these areas."