BERLIN — German police say a 26-year-old Afghan man has been shot dead outside a fitness club in the northern city of Hamburg.

A spokesman for Hamburg police said the shooting happened Friday afternoon and a suspect has been arrested.

Police spokesman Ulf Wundrack said a 23-year-old German-Afghan man was detained after trying to flee the scene by car.

Wundrack said the circumstances of the killing were "still completely unclear."