One person has died in a gun battle near the international airport in the Libyan capital, Tripoli, between a brigade calling itself "Libya's National Army" and former rebels who control the airport.
The clashes came on the same day as the country's governing National Transitional Council (NTC) held its first conference on national reconciliation.
The NTC has given armed groups in Tripoli until December 31 to disarm and leave the city.
The violence underlines the challenges the new leaders face to stamp their authority on the various armed groups that helped overthrow Muammar Gaddafi.
Al Jazeera's Sophie Jackson reports from Tripoli.