Police found a teenager, 19, with stab injuries after being called to Elmar Road just after 4.30pm yesterday (April 29).
He was taken to hospital, and his injuries have been assessed as non-life changing.
At the scene, a 26-year-old man was arrested for grievous bodily harm and he remains in custody.
Anyone with information is asked to call the Metropolitan Police on 101 quoting CAD 5346/29APR.
Alternatively contact Crimestoppers anonymously on 0800 555 111.
A London Ambulance Service spokesperson said: “We sent resources to the scene, including ambulance crews, members of our Tactical Response Unit, an advanced paramedic practitioner and an incident response officer.
“Our crews treated a man at the scene, before taking him to a London major trauma centre.”
