Green Lanes on Monday night
Footage posted to social media shows the teenager’s bloody clothing cut off by paramedics before he was taken to hospital. He remains there in a critical condition.
Police are probing a possible link between the stabbing and a robbery on a nearby popular jogging route in Finsbury Park, where they later found a discarded gun.
The suspect, described by police as a slim black man, dressed all in black and carrying a grey man bag, was chased by police from Parkland Walk before fleeing towards Upper Tollington Road. After the chase police found a discarded bag containing a firearm.
No arrests have been made.
Anyone with information is asked to ring 101 or you can tweet information to @MetCC quoting CAD 7114/12 April. Alternatively, contact the independent charity Crimestoppers anonymously on 0800 555 111.