The incident on Salisbury Avenue, Barking, was reported to the emergency services at around 9.50pm last night (July 27). Ambulance crews, a clinical team manager and an incident response officer were dispatched to the scene. A 17-year-old boy was found suffering a stab wound to his arm and was taken to a major trauma centre. “We sent resources including ambulance crews, a clinical team manager, an incident response officer and London’s air ambulance. “We treated a teenager at the scene before taking him to a London major trauma centre.”