benghazi libya libyan security force say tuesday body 16 migrants find desert near country border egypt body find 310 km 190 miles southwest coastal city tobruk say ahmed al-mismari spokesman eastern-based libyan national army say area still search detail available migrants identities past patrol rescuers recover body egyptian migrants perish strand abandon smugglers libya eastern desert migrate libya search work try reach europe boat body 16 migrants find libya 's eastern desert official