15-yr-old Serunkuma stabbed in London

Quamari Barnes was stabbed to death outside his school in north London (Photo: Facebook)

The Police in London are investigating the murder of a 15-year-old school boy believed to be Ugandan.

Quamari Barnes is reported to have been found with stab wounds outside the Capital City Academy in north East London last evening.

Witnesses told news agencies that Barnes was murdered by an unknown assailant while he waited at a bus stop at 3.30pm on Monday.

Barnes's next of kin were yet to be identified by press time. However, some sources in London told New Vision that Barnes was also known by some of his peers as "Serunkuma" - a name that partly suggests his Ugandan heritage.

"He is the grandson of Micheal Serunkuma Sangi," a source revealed.

Photo: Facebook

A 15-year-old boy has been arrested on suspicion of murder after Quamari Barnes was fatally wounded outside his school, a UK based newspaper Mirror has reported.

According to the Mirror, witnesses claim the teenager shouted "he's going to stab me" before he was allegedly murdered in front of horrified pupils.

Quamari's death has devastated his family and friends and resulted in dozen of tributes being paid to the youngster.

However, one tribute outside the school from a girl who knew Quamari was particularly poignant.

Written on a piece of paper with a picture of the teenager, it reads: "I can see you now, laughing at my art and craft skills.

"It was only yesterday you told me how proud you were that I chose drama. You made me think I was beautiful and confident.

"I can hear you say "hi beautiful" right now. You stood up for me when no one else did."

Devastated family members said the teenager had "the best heart".

His mum is said to be "devastated" over her son's death.

Speaking to the Evening Standard, an aunt, said: "His mother can't believe he has gone, she is devastated.

"Quamari had the best heart. He was a wonderful family boy. We just don't know why this happened."

Pupils and teachers lay tributes outside Capital City Academy where Quasar Barnes was killed. Photo/Mirror

Witnesses have described how terrified children ran screaming in panic after the popular youngster was killed as school finished.

Police say the victim was found with multiple stab wounds in Willesden at around 3.30pm.

He was rushed to hospital by paramedics, but was pronounced dead shortly after arrival.

A record number of 29 teenagers were murdered in London in 2008, topping the previous worst toll of 27 in 2007.

There was a steep decline to 15 teenage murders in the capital in 2009.

A total of 19 teenagers were unlawfully killed in London in 2010, while 15 teenagers were murdered in the capital in 2011.