Police are investigating after a man was found with a stab injury on Friendly Street, Lewisham at around 23:53hrs on Saturday, 14 March.
The victim, aged 20, was treated at the scene before being taken to hospital.
He remains in a critical but stable condition.
It is believed the stabbing took place on New Cross Road, SE14.
At this stage there have been no arrests.
Officers from Lewisham investigate. Enquiries continue.
Anyone who witnessed this incident or has information or related footage is asked to contact police on 101 or Tweet @MetCC quoting CAD 8342/14MARCH.
To remain anonymous call Crimestoppers on 0800 555 111.
+ Do you know about someone who is carrying a knife? If you have information that could help keep your community safe, but don’t want to speak to police, please contact the independent charity Crimestoppers on 0800 555 111. They do not ask your name and cannot trace your call or I.P address.
Any young people who have information about violence or knife crime can visit www.fearless.org where they can pass on information anonymously – your I.P address will not be traced. Fearless is part of the Crimestoppers charity, and is also independent of the police.