Forces allied to the Libya unity government on Sunday launched a counter attack to the troops loyal to the rival government and claimed to have taken control of key eastern oil terminals.
According Ali al-Hasi, spokesman for the Petroleum facilities guard, the Libyan unity government forces launched surprise attacks on forces of Khalifa Hafter in the oil crescent.
Haftar is the commander of troops loyal to a rival administration based in Tobruk in eastern Libya.
Al-Hasi claimed that Libyan unity government forces regained control of the Sidra oil port and Ras Lanuf area in eastern Libya during the fighting and continue to march on to regain control of all oil terminals in the area,” he said.
The Ras Lanuf and Sidra oilfields are estimated to account for more than half of Libya's oil production.
Libya has been roiled by chaos since the ouster and subsequent killing of strongman Muammar Gaddafi in 2011.