The rescue service and the police were called to a seriously injured man in Schulstrasse in Wedding around 11 p.m. on Sunday evening. It was on the sidewalk, not far from a bar. He died on the spot.
Relatives who had arrived were stunned and questioned by the police.
The circumstances of the death are currently unclear. A homicide squad began the investigation that night.
The detectives also examined a car parked on the opposite side of the bike path, facing the opposite direction.
Schulstrasse was closed until 5 am.