At least 13 people have been killed in clashes between rival milita groups Rival militias have clashed on the outskirts of the Libyan capital for a fourth day in the deadliest and most sustained violence since the capture and killing of Muammar Gaddafi last month.  Fighters attacked each other with rockets, mortars and machine guns, witnesses said.
The fighting, which has killed at least 13 people since late last week, raised new concerns about the ability of Libya's transitional government to disarm thousands of gunmen and restore order after an eight-month civil war.
Libya's interim leader, Mustafa Abdul-Jalil, said his National Transitional Council (NTC) brought together elders from the feuding areas - the coastal city of Zawiya and the nearby tribal lands of Warshefana - over the weekend and that the dispute has been resolved.
"I want to assure the Libyan people that everything is under control," he said.
However, fighting continued as he spoke.
Heavy gunfire and explosions of rocket-propelled grenades (RPGs) were heard over several hours in the area between the Warshefana lands, about 30km west of Tripoli, and Zawiya, another 15km to the west. White smoke rose into the air.
At one point, the two sides were battling for control of a major military camp of the ousted regime, said a fighter from Tripoli. The camp, once a base of elite forces commanded by one of Gaddafi's sons, Khamis, is located on a highway midway between Tripoli and Zawiya.
In all, at least 13 people were killed in the fighting, including four from Zawiya and nine from Warshefana, according to gunmen and a hospital doctor in Warshefana.
More than 100 people from Warshefana were wounded since Saturday, said the doctor, Mohammed Sawa. Casualties stemmed from gunshots as well as shrapnel from rockets and mortar shells.
On Sunday evening, a Warshefana field commander, Ashraf Borwais, delivered a severely burned fighter to the local hospital. He said the man was wounded when his vehicle was struck by artillery and exploded.
Borwais said fighting had stopped in the evening. "The dogs have retreated," he said, referring to the Zawiya militiamen
Zawiya fighters, meanwhile, manned roadblocks on the outskirts of their city at intervals of about 200 metres. Groups of jumpy armed men, some brandishing RPGs, crowded around the checkpoints. Fighters searched boots of cars and checked identification papers.
The reason for the initial clash remains unclear, although accusations have been flying, including that some of the Warshefana had links to the old regime. At one point last week, fighters from Zawiya entered Warshefana and seized weapons. In retaliation, Warshefana fighters set up random checkpoints and fired at the main highway.
Abdul-Jalil said the NTC has established a committee to address the grievances of both sides. He said the fighting was sparked by young men behaving irresponsibly, but he did not elaborate.
Despite the growing tensions, Abdul-Jalil and other NTC leaders have said they cannot disarm the fighters quickly.
 Noting high unemployment among the armed men, Abdul-Jalil said the new government must offer alternatives first, including jobs, study and training.