A Red Crescent worker has claimed that more than 50 civilians have been killed in the past 24 hours in tribal warfare in southern Libya. Moussa Bazama, an ambulance worker, says rockets, mortars and gunfire rocked residential areas in the desert town of Kufra, leaving scores killed and injured. For more than a week, the powerful Arab tribe of al-Zwia clashed with the African Tabu tribe in the border area where Libya, Chad and Sudan meet.