Officers attended the scene, along with colleagues from the London Ambulance Service and treated a 16-year-old for a stab wound to the back. He was taken to the hospital for treatment. His condition is unknown at this time.
Anyone with information is asked to call 101 or tweet @MetCC quoting CAD 5897/13Oct.
Information can also be provided to Crimestoppers, anonymously, by calling 0800 555 111.