Three people have been killed during a retaliatory tribal fighting in the southern Libyan city of Sabha, said a source of the Security Directorate of Sabha.
The source told Xinhua on Sunday, "Three people were killed as a result of reprisals between the Awlad Sulaiman and Tabu tribes, which led to a security tension in some neighbourhoods of the city".
A Tabu checkpoint was set up on Sunday morning after unidentified gunmen opened fire at a cafe in a Tabu neighbourhood on Saturday.
When a military commander named Madi Omar of Awlad Sulaiman origin passed the checkpoint, he was shot and killed immediately after refusing to stop, the source explained.
Two security personnel were killed and a third was injured earlier Sunday when unidentified gunmen attacked the security headquarters in the city.
Sabha, some 800 km southwest of the capital Tripoli, witnesses frequent kidnappings by armed groups.
Libya has been plagued by insecurity and a political chaos since the overthrow of Muammar Gaddafi's regime in 2011.
