The man, suspected of using a false document, a felony, opposed continued detention, but Malmö District Court sided with the prosecutor.
The tanker was boarded by police and the Coast Guard off the coast of Trelleborg on March 12. The ship is on the EU sanctions list. In recent years, the Comorian-flagged vessel has transported oil products between Russia and Brazil, according to the Coast Guard.
Six days earlier, the bulk carrier Caffa was boarded, and that ship's Russian commander is also in custody, suspected of the same crime.
