A 16-year-old boy has been arrested in connection with the death of a talented teenage footballer.
Kiyan played as a striker for QPR's youth team
Kiyan Prince, 15, is thought to have been stabbed as he tried to break up a fight outside the London Academy school in Edgware, north London, on Thursday.
A post-mortem examination gave the cause of Kiyan's death as a single stab wound to the chest.
Scotland Yard said the arrested boy had been taken to a north London police station, where he remains in custody.
Kiyan, who lived with his mother and 18-year-old sister, had been leaving school with dozens of fellow pupils on Thursday when police believe he became involved in an altercation.
School principal Phil Hearne said teachers saw the 15-year-old collapse a short distance from the school outside Stamford Court, in Kings Drive, and immediately contacted the police.
An officer administered first aid, but the teenager died two hours later in hospital.
Kiyan, who was a member of the youth team at Queens Park Rangers, was described as "one for the future" by the football club.
QPR fans have left tributes at the club's Loftus Road ground.
Ministers are being urged to tighten the law on knife crime following the fatal stabbing and there have been calls for the wider use of airport-style security screening in schools.