The 1998-built No.5 SJ Gas, which is for the time being anchored in the Bohai Sea, started leaking gas off the coast of Dongying, China. The gas leak was allegedly resulted because a faulty valve.

Additionally, reports support that the leak occurred after the ship didn't manage to shut down the valve for one of its cargo tanks.

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The time the incident took place, the vessel was loaded with 1.850 tonnes of LPG and was approximately 25 kilometres away from the Dongying port. The Korea-flagged vessel had a crew of 15 sailors aboard.

Concluding, after the incident  the master notified authorities and asked for anchorage, to fix the valve. The gas concentration on and around tanker is said to be below explosion level.