The incident occurred in Lavender Hill, Clapham, on 18 May 2016 at around 17:00hrs, when a group of males became involved in an altercation with an unknown suspect on a bicycle across the road from where they were standing.
The male discharged a firearm in their direction; no one was injured.
The group then pursued the suspect who made off east on his bike along Lavender Hill. The suspect managed to get away.
A 9mm shell casing was recovered from the scene. It is believed that a 9mm hand pistol was used.
Officers from the Trident and Area Crime Command investigate.
He was wearing either a black ski mask or dark-coloured scarf over his face.
The bicycle he was riding is described as a dark coloured mountain bike.
There have been no arrests, and enquires continue.
Anyone with information is asked to call police on 020 8247 4863 or the police non-emergency line on 101. You can also tweet police @MetCC.
Alternatively, contact Crimestoppers anonymously on 0800 555 111.
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