Detectives are appealing for witnesses and information following the discharge of a firearm in Hampstead.
On Wednesday, 21 September police were called at around 23:20hrs to reports of a firearm discharged in Fellows Road, NW3.
Officers attended and found evidence of the discharge but no injured persons.
Police were subsequently informed that a man, aged 20, had attended a central London hospital suffering a gunshot injury. His injury is described as not life threatening.
Detectives from the Trident and Area Crime Command are investigating.
Any witnesses or anyone with any information are asked to contact Trident via 101. To give information anonymously contact Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.
There have been no arrests and enquiries continue.