Firefighters try to put out the fire in an oil tank in the port of Es Sider, in Ras Lanuf, Libya, January 6, 2016. Firefighters have extinguished two fires at oil storage tanks at Libya's Ras Lanuf terminal, but blazes continue at five tanks in the nearby port of Es Sider after attacks this week by Islamic State militants, a Petroleum Facilities Guards (PFG) spokesman said on Thursday. Picture taken January 6, 2016. REUTERS/Stringer

More attacks on Libya’s oil facilities are likely unless a United Nations-backed unity government is approved, and militants hit one oilfield just last week, the head of the National Oil Corporation (NOC) said on Monday.

Mustafa Sanalla told Reuters that suspected Islamic State (ISIS) militants had staged their latest attack against Libya’s oil infrastructure on late Thursday or Friday, setting fire to one production tank and damaging another at the Fida oil field.

Fida lies south-west of the oil terminals of Es Sider and Ras Lanuf, where militants launched repeated assaults and inflicted major damage last month.

Total current production stands at 360,000-370,000 barrels per day, he said, less than a quarter of the 1.6 million bpd that Libya was producing before the uprising that toppled Muammar Gaddafi in 2011.