Libya’s National Oil Corporation (NOC) partially reduced output at the El Sharara field, one of the country’s largest, NOC chairman Massoud Suleman told Reuters on Monday.

He gave no reason. Two engineers at the field told the agency output fell by about 200,000 barrels per day, to between 100,000 and 105,000 bpd; Libyan outlet Al Wasat puts the field’s total capacity at around 300,000 bpd. Last week the NOC warned it might declare force majeure after the illegal closure of a valve on the Hamada–Zawiya pipeline halted two fields in northwestern Libya, Al-Tahara and Al-Hamada; production there later resumed, according to the Libya Observer. Similar disruptions at El Sharara in recent years have come from protests, political standoffs and sabotage, and this time the company gave no reason.