Police were called at 4.47pm to reports of a group of youths fighting near Alexandra Palace #Haringey #N22.
Officers attended with LAS and London’s Air Ambulance.
One male, believed to be in his teens, was taken to hospital with a stab injury; condition update awaits.
At this early stage there have been no arrests.
Road closures are in place and enquiries continue.
Witnesses those with information – please call 101 ref CAD 5463