Forces under Khalifa Haftar's command said they had seized El Feel oilfield after they received its control from the security force that was protecting it.
Reliable sources said the force securing the oilfield is still inside and no new forces have entered the field, adding that the Tuareg tribal force itself joined Haftar's forces.
Haftar's forces have also seized control last week of Sharara oilfield after a deal with the force that was protecting it.
World Bank has issued a new strategy to support Libya, concentrating on bringing services to people, recovering economy and rebuilding the country in the future.
In a statement on Wednesday, the World Bank said the new strategy was issued in response to a request by the Libyan Presidential Council and based on working ethics with countries plagued by instability.
"World Bank will be working on supporting the Libyan people in the coming three years." The statement reads.
Fighters under the command of Khalifa Haftar have murdered the director of security department in Murzuq town in southern Libya, Mohammed Kari, local sources reported.
The sources added that the gunmen stormed into Kari's house on Wednesday and then killed him in cold blood.
They indicated that Haftar's forces also stole the safe of the director from his house before setting it ablaze.