A schoolboy is in hospital after being stabbed on a bus in broad daylight.
A 15-year-old was found nearby in Dobson Close with a stab wound to his abdomen.
He was taken to a hospital in north London in a life threatening condition, but is now in a stable condition.
Another 15-year-old boy has been arrested on suspicion of causing grievous bodily harm with intent and is in custody at a police station in north London.
Officers from the local safer transport teams are providing community reassurance patrols in the area.
Detective Chief inspector Michael Dougall, from the Transport Policing Command, said: “Tackling knife crime and reducing violence remains our number one priority and we continue to work tirelessly to bring perpetrators to justice.
“If you have any information about this incident I urge you to come forward. Were you on Finchley Road between 4.20pm and 4.40pm? Did you witness an altercation or someone running away? Any piece of information, no matter how small, may be vital. Please contact police.
“Knife crime causes devastation and I ask that anyone with any information about individuals carrying weapons does the right thing and reports this to police. To remain anonymous, you can contact Crimestoppers on 0800-555111”.
If you have any information regarding this incident, contact the police on 101 quoting reference number CAD 5349/23JUN21, or the CID direct on 07500-607652.