( CNN ) -- Two U.N. World Food Programme workers and a third colleague from a local agency were shot to death in Somalia Friday , the organization said . The trio was attacked in Mataban town in Hiban Province in central Somalia , United Nations spokesman Martin Nesirky said . The World Food Program said its two slain employees were Muhyedin Yarrow and Mohamed Salad . The third victim , Abdulahi Ali , worked for Doyale , one of agency 's partners . The incident illustrates the risks that humanitarian workers can face working in dangerous and difficult environments , Nesirky said . The aid workers were part of a mission in the area that was monitoring food distribution and camps for internally displaced people . U.N. Secretary-General Ban Ki-moon called `` on authorities to ensure the safety of humanitarian workers , '' a spokesperson said . `` He expects those responsible to be swiftly brought to justice . '' The alleged shooter reportedly gave himself up and was arrested , the agency said . World Food Programme operations in Mataban have been suspended while the case is investigated . `` WFP condemns the killing of people who devote their lives to helping others and extends its deepest condolences to the families of the victims , '' the agency said in a statement . Yarrow , 54 , had worked for the agency for 13 years , and Salad , 28 , joined the organization two years ago , it said .
NEW : The names of the victims are released . Two victims were from the UN 's World Food Programme . The third victim worked for a local government agency .