Detectives are investigating the unexplained death of a man found in Harelsden during the early hours of this morning.
The 21-year-old, who has not yet been identified, was discovered in Church Road at 4.45am and was pronounced dead at the scene.
Police arrested a 27-year-old man and who is being held in custody at a north London police station.
A post mortem examination and inquest are yet to be arranged.
