Air strikes halted production at Libya's 70,000 barrel per day (bpd) al-Feel oilfield on Wednesday, the National Oil Corporation said, as eastern-based forces retaliated after a rival group took control of the field.
The fighting reignites a conflict for control of large oilfields in southwestern Libya between competing military alliances that are also battling on the outskirts of the capital, Tripoli.
"There have been air strikes at the gates of the al-Feel oilfield and inside a housing compound at the field used by NOC personnel," NOC Chairman Mustafa Sanalla said in a statement.
"Production will remain shuttered until military activity ceases and all military personnel withdraw from NOC's area of operations."
The eastern-based Libyan National Army (LNA), led by Khalifa Haftar, said its jets had launched air strikes "at the perimeter of al- Feel oilfield targeting the positions of armed groups that attacked the field."
Earlier on Wednesday, forces aligned with the internationally recognized government in Tripoli had claimed control of al-Feel following clashes.
Some members of the forces posted videos or photos on social media appearing to show them at the field.
Libya's oil production has been repeatedly disrupted in recent years by conflict and blockades, but is currently relatively stable at about 1.25 million bpd.
Libya has been divided since 2014 into rival military and
Air strikes shut production at Libya's al-Feel oilfield