Two people were killed and several injured in clashes between Libyan soldiers and tribesmen in the remote southeast, a local doctor and tribal representative said, underlining the unrest still raging seven months after Muammar Gaddafi's overthrow. Violence erupted in the early hours of Saturday in the city of Al Kufra, near Libya's borders with Chad and Sudan, where armed forces were sent to in February to quell fighting in a long-standing rivalry between the Tibu and Zwai tribes. Bouts of violence in the southern Sahara and in the mountainous west have shown how volatile Libya remains following the demise of Gaddafi, who had long played off one tribe or clan against the other to weaken their power. “The Tibu launched an attack on the city, the army responded and fighting is continuing,” Muftah Abukhalil, a member of the local council, said by phone, without giving details.