UK police Friday again extended the detention of the captain of a cargo ship which struck a tanker in the North Sea, citing the "complexities" of the case. Police cited the location of both vessels at sea as one of the complications facing the probe,

Extra time is "imperative to the investigation" because of the "complexities of the incident" and the "number of witnesses involved", Humberside Police says.

The police in Britain detained the ship’s captain on suspicion of gross negligence after it crashed into an oil tanker that was being operated by the U.S. Navy.