A Greenwich man who stabbed a rival gang member to death as part of an "ongoing feud" has been jailed for life.

Arif Biomy, 19, of Wickham Lane, was sentenced today to life imprisonment, serving a minimum of 21 years, after he was found guilty last month of murdering 16-year-old Alex Smith.

A second man, Yusuf Yusuf, 19, of Sandwell Crescent, NW6, was jailed for 34 months after he pleaded guilty to assisting an offender.

Inner London Crown Court heard how Alex Smith was stabbed to death just after 11pm in Camden on August 12, 2019.

Biomy was one of six members of a rival gang driving around the Fitzrovia and Euston Road area looking for rivals to attack.

A police spokesperson said: "There were six people in the gang’s two stolen cars, a Ford Fiesta and a Seat Leon both on false plates. The latter was driven by Biomy.

"Just after 10.30pm, Alex and some friends left a restaurant via an entrance onto Bolsover Street W1.

"A short time later, the group ran to an estate on the north side of Euston Road where they took refuge for a period of time. It is believed that they had come into contact with the suspects in either or both of the stolen cars before running off.

"Just after 11pm, the two cars pulled up in Longford Street NW1 where a number of males ran into a block of flats looking for rival gang members.

"Moments later, Alex and his friends were spotted by the other occupants of the cars.

"While Biomy stayed in the Seat, Alex was chased by three males to Munster Square, just north of Euston Road, where he was stabbed to death.

he Met said that six males in two cars sped away from the scene, leaving Smith for dead.

Despite the best efforts of the emergency services called to treat him, he died at the scene.

Police identified a number of suspects after inspecting CCTV footage and found that Yusuf was responsible for setting the two cars used by the suspect alight shortly after the killing.

The prosecution in the case argued that all of those who were in the two cars committed the offence of murder together "as part of a joint plan or agreement".

"It was clear that Biomy, although he never left the stolen Seat Leon, was a key member of the group who killed Alex," the Met said.

Police revealed on Tuesday that the driver of the Fiesta was still not known to police, but that two of its passengers — aged 19 and 20 at the time — were thought to have left the UK "within days of Alex’s death and are believed to be overseas."

Meanwhile the city police force added that one of the passengers in the Seat Ibiza driven by Biomy — a 20-year-old man — had been detained under the Mental Health Act and "is not fit to stand trial."

Anyone with information that could assist the investigation is asked to call the incident room on 020 8358 0400. To remain anonymous call Crimestoppers on 0800 555 111.