Treinen, who is originally from Belgium, is 170 centimetres tall, of slim stature, and has a stubbly beard. He was wearing a bright red t-shirt at the time of his disappearance.
People with information on Treinen’s whereabouts should contact the Troisvierges police department via phone (+352 244871000) or email (police.troisvierges@police.etat.lu).
