The UN's food agency said Thursday it needed guarantees on its employees' security in Somalia, hinting it could soon halt deliveries in some areas. Four World Food Programme (WFP) employees have been killed in the war-torn Horn of Africa country since August last year, two of them this month. "We will not stop food distribution yet but (sic). We will distribute all the food that we currently have inside Somalia" or on its way there, WFP chief Peter Goossens said at a press conference in Nairobi. The WFP said it was in the process of delivering 57,000 metric tonnes of food in southern and central Somalia, enough to feed 2.5 million people for one to two months.