A teenager fatally stabbed in Kilburn has been named as Claudyo Jauad Lafayett.
Emergency services were called to Granville Road at 11.22pm on July 14 following reports of a fight in the street and a person stabbed.
Claudio's family has been informed and are being supported by specialist officers.
A post-mortem examination held on Tuesday (July 18) gave cause of death as a stab wound to the abdomen, Scotland Yard said.
Another male, also believed to be 17 years old, was treated at the scene before being taken to hospital, where he remains in a stable condition.
A woman, aged in her early 20s, received hospital treatment for an injury to her hand and has since been discharged.
Detectives from the Met's Specialist Crime Command are investigating.
On Saturday (July 15), an 18-year-old man was arrested on suspicion of murder and released on bail.
On Monday, (July 17), officers arrested two men – both aged 18 years old.
They have also been released on bail.
Det Ch Insp Wayne Jolley, who is leading the investigation, said: “Although we have arrested three people, I am certain that there is more information that will help our investigation.
"I urge anyone who is yet to come forward to please speak with us.
“A birthday party has ended in tragedy, and a family has been left mourning the loss of a young man who had his whole life ahead of him.
“Did you see or hear anything? Did you film the incident on your phone? Call us and let us know what happened.”
Anyone with information should call police via 101 quoting reference CAD 8929/14Jul or visit https://mipp.police.uk/operation/01MPS23V46-PO1.
To remain anonymous contact Crimestoppers on 0800 555 111.
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