Iran Press/Africa: The NOC said that the blockage was an attempt to "blackmail Mellitah Oil and Gas Company" by the guards.
NOC confirmed that Khaled and Abdelhamid Al Wakwak and members of the Petroleum Facilities Guard in the south-west led the blockage, which would "affect citizens in the western mountain area, and potentially result in power outages", Xinhua reported.
"If the blockade continues, the company will be forced to suspend all operations in the Al-Wafa field and evacuate all employees," the statement said, adding that the closure will result in the cessation of gas supply from Al-Wafa to the Al Ruwais power plant.
The oil firm demanded an immediate end to the blockage, claiming to "prosecute criminal behavior under local and international laws."
The protesting Libyan security guards on Wednesday have closed the airport of the Al-Wafa oilfield, some 540 km southwest of the capital Tripoli and co-owned by Italy's ENI, the NOC said in a statement on Thursday.
Al-Wafa field produces nearly 40,000 barrels of crude oil and 400 million cubic feet of natural gas a day. But the oilfield operator will be forced to shut down the field should the closure continue, NOC said.
Since 2011, guards, paid by the state to protect the oil facilities, along with other groups, have been frequently seizing oilfields to coerce weak authorities into extra pay and benefits.
In the past, Libya's NOC and other government bodies have compromised in the end to keep the oil and gas exports stable, the economic caterpillar for the OPEC producer.
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Libya closes capital airport
