COPENHAGEN (Danish) -- A British seaman aged 30 was charged Tuesday with negligent manslaughter in connection to a fatal cargo ship collision last January. The suspect was "particularly aggravating" because he was drunk while on duty.

Two crew members of the Danish-flagged Karin Hoj were lost when the freighter collided with the British Scot Carrier on December 13. The collision occurred in the Baltic Sea off the southern coast of Sweden. It capsized without sinking. According to Danish authorities, the British seaman was the duty mate of the Scot Carrier.

Briton was also charged for failing to help or assist Karin Hoj's team. The Swedish police arrested him shortly after the collision and extradited him to Denmark in February. Since then, he has been in pre-trial detention and will be facing a trial in Copenhagen later in the month.

Two seamen were left missing when the cargo ships collided with each other south of Ystad, Sweden. This is close to Bornholm in Denmark. Their bodies were eventually found by a combination of air and sea searches.