According to the information given by the Libya’s UN-backed government, in an incident that took place near Libyan capital Tripoli killed at least 21 and 27 others got injured after a fight between rebel forces.
Rebel forces under Gen Khalifa Haftar have advanced from the east with the aim of taking Tripoli, the media reported.
Prime Minister Fayez al-Serraj has accused him of attempting a coup and says rebels will be met with force.
Among the dead was a Red Crescent doctor killed on Saturday. Gen Haftar’s forces said they had lost 14 fighters.
International powers have begun evacuating personnel from Libya amid the worsening security situation.
Libya has been torn by violence and political instability since long-time ruler Muammar Gaddafi was deposed and killed in 2011.