A general view shows an oil refinery in Zawia, 55km west of Tripoli December 18, 2013. Libya is stepping up fuel imports, with four tankers queuing at one port as the OPEC producer's second-largest refinery is running at only half its capacity due to oilfield strikes, a senior official said. A mix of militias, tribesmen and civil servants demanding political rights or a greater share of Libya's oil wealth have occupied several oilfields and ports, cutting exports to 110,000 barrels per day (bpd) from over 1 million bpd in July. The government has struggled to keep the 120,000-bpd refinery in Zawiya operating since protesters in October closed the El Sharara oilfield that feeds it. Since then, Zawiya has runs off existing stocks and supplies from the eastern Brega port, which officials have closed for exports for that reason. To match Interview LIBYA-OIL/REFINERY Picture taken December 18, 2013. REUTERS/Ismail Zitouny (LIBYA) - RTX16OQI