Detectives have launched an investigation after a man was stabbed near Clapham Junction station.
Police were scrambled to Falcon Road after a victim, 24, collapsed with knife injuries.
Officers were called at at just before 2.45pm on Thursday.
The victim has been taken to hospital where his injuries are not believed to be life-threatening, according to police.
Officers are trawling through CCTV footage from around the scene and appealing for witnesses to come forward.
A police statement said: "There have been no arrests at this very early stage.
"A crime scene is in place and police are asking for any witnesses or those with information/ material that could help them to call 110 ref CAD 4184/23 Nov".
To remain anonymous call Crimestoppers on 0800 555 111.
