A 15-year-old has been arrested in connection with the fatal stabbing of a schoolboy in Willesden yesterday afternoon.

The victim, who has been named locally as Quamari Barnes, died after he was attacked outside Capital City Academy in Doyle Gardens.

The boy, who does not attend the school, was arrested at an address in Norbury, south London, today at 1.30pm.

Police and paramedics were called to the scene of the stabbing at around 3.30pm.

Quamari was rushed to hospital but died a few hours later.

DCI Mark Lawson, who is leading the murder hunt, is appealing for witnesses or anyone with information to come forward.

He said: “The area around Doyle Gardens and Uffington Road was very busy at the time of the murder. A large number of children were going home from school. I would like to hear from them, or their parents, as I’m certain that people will have information that could prove vital to the investigation.

“Whilst the motive for this stabbing remains unclear, I would also like to speak with anyone who may have heard about what happened after the attack.”

Alex Thomas, principal of Capital City Academy, said: “Capital City Academy has been overwhelmed by the kind words and messages of support received today following a tragic incident after school yesterday which led to the death of a 15-year-old boy.

“We are deeply saddened by this death; it is undoubtedly a tragic loss of life. Our thoughts and prayers are with his family and those who knew and loved him. He was positive about learning and had a bright future; he will be greatly missed by his many friends and the entire school community.

“I have been informed by the police that an individual not connected in any way with the school has been arrested. “Capital City Academy will continue to provide support to students and staff at the school from councillors in the coming days and weeks.”

Anyone with information is urged to contact police via 101 or by tweeting @MetCC. They can also contact Crimestoppers anonymously on 0800 555 111.