The boy was treated by paramedics on Westbourne Road near the junction of Sheringham Road at 1.02pm yesterday (December 9).
He was rushed to hospital, however, died shortly later during the afternoon.
At the turn with Atlas Mews, many flowers have been laid in respect of the teenage victim.
There were also alcoholic bottles such as a Smirnoff and Buzzballz, along with Digestives biscuits.
Police tape has cordoned off Atlas Mews, along with officers closing off Westbourne Road and Arundel Square.
Within the shut off area, a forensics tent has been erected, with forensic officers at the scene last night.
Resident Dior Williams, 21, told the Press Association: “I feel like there’s a lot of gangs around here, and it’s just gotten a lot worse over the years.
“I did use to feel really safe here, but recently not so much. There’s always something happening. There was someone that got murdered here a few years ago at the same spot, so it’s really sad.”
The boy’s next-of-kin has been informed and are being supported by specialist officers, the Metropolitan Police said.
Chief Superintendent Jason Stewart, who leads policing in the local area said: “Our thoughts are with the family and friends of the victim at the incredibly sad and difficult time. We understand this is incredibly concerning for the community, particularly considering the young age of the victim.
“Officers are in the area carrying out urgent enquiries and cordons remain in place. I would urge anyone who saw the incident or has any information, to please get in touch with us, or do so anonymously through Crimestoppers.”
Anyone who has information that may help police with their investigation is asked to contact police on 101 quoting ref CAD 3568/09DEC.
Alternatively, you can contact Crimestoppers anonymously on 0800 555 111.
