Libyan emergency services have been battling to contain a huge blaze at a major oil plant after it was targeted by unknown attackers. The Zawiya refinery, west of the capital Tripoli, was hit in a drone strike on Monday evening - the third such incident in two days. The National Oil Corporation (NOC) said a tank containing about 4.5m litres of fuel was directly hit, triggering a huge fire that caused it to collapse. The Zawiya refinery is the largest operational facility in Libya, with an output of 120,000 barrels per day. The NOC condemned similar attacks in past days in Zawiya, including two drone strikes on a naphtha reservoir and a water desalination plant.