A 17-year-old boy is fighting for his life in hospital after being stabbed in broad daylight.
Emergency services, including the London Air Ambulance were scrambled to Maitland Park Road in Belsize Park just after 2pm to reports of a male stabbed in the vicinity.
Officers and paramedics found a 17-year-old with a stab injury, Scotland Yard said.
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He was taken to hospital by the London Ambulance Service and is still in a critical condition.
A Metropolitan Police spokesperson said: "A number of crime scenes are in place and two weapons have been recovered.
"Two people have been arrested in connection with the investigation."
Anyone with information should call police via 101 quoting reference CAD 3960/22Mar.
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