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One VLCC, Maersk Hojo, was last seen on Sunday moving away from Qingdao. Another, Front Falcon, was headed to Ningbo, where Sinopec has a major refinery.
Both VLCCs were carrying crude oil and were waiting to berth at Qingdao when the blast at a major pipeline occurred. The explosion killed 52 people and caused supply disruptions to refineries in the area.