Police were called to an incident on Garratt Lane, Earlsfield on Thursday, October 21, just after 2.30pm.
Upon arrival, police found a man with a “stab injury”.
The man was taken by the London Ambulance Service to a South London hospital.
A police spokesperson has said: “Police were called at 2.32pm on Thursday October 21 to reports of an assault on Garratt Lane, SW18.
“Officers attended and found a man suffering from a stab injury. He was taken by the London Ambulance Service to a south London hospital; we await an update on his condition.”
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“At this early stage, there have been no arrests.
“Anyone with information is asked to call police via 101 quoting reference CAD 4165/21Oct.”
Following the incident, Garratt Lane, Earlsfield was shut in both directions.
The street was closed after the stabbing had taken place.
A local police Twitter account said: “A section of Garratt Lane from the junction with Skelbrook to the Railway Station on both directions is closed due to an incident which police is investigating.
“Please avoid the area.”
More to follow