The drone hit a gasoline tank at the Zawiya oil refinery in the Mediterranean town of Zawiya on Monday, about 47 kilometers (about 30 miles) west of capital Tripoli, the state-run National Oil Corporation said. As they fought the flames, another drone hit close to a key oil tank nearby but did not cause casualties or damage, the company said. Monday’s strikes were the latest in a series of drone attacks on oil infrastructure in Zawiya, which houses critical energy infrastructure including the country’s largest oil refinery, an export terminal and a power plant. The attacks come as tensions are rising between the government of western Libya and a warlord who controls the city of Zawiya. Much of western Libya is ruled by local militias loosely allied to Prime Minister Abdul-Hamid Dbeibah’s government in Tripoli.