The Russian captain of a cargo ship that collided with a U.S. tanker earlier this week appeared in a U.K. court Saturday where he was remanded in custody over the death of a crew member, who is missing and presumed dead.

U.K. police say the Solong cargo ship's captain, identified by the vessel's owner as a Russian national, was detained on suspicion of negligent manslaughter.

The captain of the Solong cargo ship who was arrested after crashing into an oil tanker off the English coast is a Russian national, the vessel’s owner said Wednesday, as maritime experts search for answers.