A drone from an unknown attacker hit a petrol tank at Libya's Zawiya oil refinery on Monday. (AP PHOTO)A drone from an unknown attacker hit a petrol tank at Libya's Zawiya oil refinery on Monday. The drone hit a petrol tank at the Zawiya oil refinery in the Mediterranean town of Zawiya on Monday, about 50km west of capital Tripoli, the state-run National Oil Corporation 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 drone strikes come as Turkish Foreign minister Hakan Fidan is set to arrive in Libya for a visit.