A teenager has been arrested on suspicion of murder after a rapper was stabbed to death at Notting Hill carnival in August.
Takayo Nembhard, 21, also known by his rap name TKorStretch, died after being stabbed in Ladbroke Grove, west London, on 29 August.
The 18-year-old was arrested on Tuesday after handing himself in to police. He remains in custody.
Officers say they still need to trace another man whose image, captured on CCTV, has been released.
DI Laura Semple of the specialist crime unit said: “Do you know who this person is? He was caught on CCTV at the carnival and we still urgently need to trace him.
“If you can help or have any information – no matter how small – about Takayo’s murder please come forward.”
Nembhard, a performer from Bristol, was killed while there were crowds of several hundred people in the immediate area. He was attacked in Ladbroke Grove, under the Westway flyover.
He was taken to hospital where he died. The cause of death was a stab wound to the right groin femoral artery.
On 19 October, a 23-year-old man and an 18-year-old man were arrested in Bristol on suspicion of murder. A 20-year-old woman was also arrested in Islington, north London, on suspicion of assisting an offender.
The teenage man and the woman were bailed pending further inquiries, while the other man was released under investigation.
A 17-year-old boy was arrested in Bristol on 22 October on suspicion of the murder and subsequently bailed pending further inquiries.