Two crew members were seriously injured when fire broke out on a North Korea-registered cargo ship in Hong Kong waters on Tuesday. The 77-metre-long ship was located south of Tsing Yi Island when it caught fire shortly after 9am. A fire-fighting ship was sent to tackle the blaze. The fire was apparently caused by an explosion in the vessel’s engine room, the Marine Department said. Two crew members, aged 32 and 50, suffered serious burns, according to the pilot of a government helicopter that took them to hospital. Both sailors were taken to the Prince of Wales Hospital in Sha Tin for treatment on Tuesday afternoon. The unladen 1,400-tonne ship had 13 other crew members on board on Tuesday, the department said.