A murder investigation has been launched following a stabbing in the summer.
Police were called to reports of a stabbing in Montesole Playing Fields in Pinner on August 26 at around 6.05pm.
A man, 18, was found suffering stab wounds and rushed to hospital with serious injuries.
The man was later identified as Daniel Bytyci from Harrow.
While he received care at the hospital in the past weeks, he died yesterday (September 10).
Police say a post-mortem examination will take place in due course.
Two 15-year-old boys were charged on August 31 at Willesden Youth in connection with the murder of Daniel.
Detectives from the Specialist Crime Command are investigating led by Detective Inspector Claire Hine.
DI Hine said:“I would appeal to anyone who was in Montesole Playing Fields that evening and saw this incident, or the events leading up to this incident, to contact police.
“While enquiries remain ongoing to establish the motive to Daniel’s murder, there is nothing at this time to suggest it is gang related.”
Chief Superintendent Roy Smith, Commander of the North West Command Unit which covers Pinner, said: “My officers responded immediately to this call and, along with our colleagues from the London Ambulance Service, they did all they could to save Daniel’s life.
“My thoughts are with Daniel’s family and friends at this tragic time.
“Two people have been charged in connection with this incident and the investigation into Daniel’s murder remains ongoing. I would like to reiterate that my officers will use every tactic and every opportunity to bear down on violence and arrest those intent on engaging in criminality on our boroughs.”
Anyone with information that could assist police is asked to call 101 or tweet @MetCC and quote CAD5906/26Aug. Alternatively, contact the independent charity Crimestoppers anonymously on 0800 555 111.
• Two men, aged 22 and 24, were also arrested on suspicion of murder and have been bailed until a later date in September.