Libya’s National Oil Corporation (NOC) confirmed Wednesday that gunmen stormed and seized the al-Mabrook oilfield in central Libya.
A French diplomatic source told Reuters that four local employees may have been killed during the attack.
It is still unclear how many people were harmed.
France’s Total holds a stake in the field but withdrew its staff in 2013 and had no employees at the site when the attack was launched.
“Unknown gunmen stormed the Mabrook oilfield last night,” a NOC spokesman said.
No group has officially taken responsibility for the attack.
Further details about the attack have not been disclosed.
Production at the 40,000 barrel per day field was halted in December following an attack on the Es Sider export terminal.
Six oil storage tanks at the Es Sider oil port caught fire December 25 after a rocket attack was launched by supporters of self-proclaimed prime minister Omar al-Hassi.
Libya’s oil fields and ports have been the site of multiple attacks during the last two months as two rival parties fight for control of the oil rich nation.
In January, the NOC said it suspects that a missing senior Libyan oil official may have been abducted.
Although Libya has one of the largest crude reserves in the world political tensions have prohibited the country from producing at full capacity since dictator Muammar Qaddafi was overthrown in 2011.