A man arrived in hospital to be treated for a gunshot wound minutes after reports of a firearm being used in incidents which police are linking.
Detectives from Trident Crime Command are appealing for information following the shooting.
Police were called at 9.31pm on Tuesday, 4 June to Bedford Road at the junction with Fenwick Place, near Clapham North Tube station, following reports of a firearms discharge.
Officers found no trace of any victims or suspects.
At 9.46pm officers were alerted to a 24-year-old man who had presented at a South London hospital suffering from a gunshot wound to the leg. His injuries were declared not life-threatening.
Detectives have linked this injured person to the shooting.
A shell casing has been recovered.
At this stage there have been no arrests.
Any witnesses or anyone with any information is asked to call police on 101 or contact via Twitter @MetCC. Quote CAD 7863/4 June.
To give information anonymously contact Crimestoppers on 0800 555 111 or online at crimestoppers-uk.org.