Police at the scene in Brent yesterday (Picture: Ben Cawthra/LNP)

A teenager has been arrested on suspicion of murder after a boy was stabbed to death after a birthday party in London.

The 17-year-old was fatally attacked in the street in front of party-goers in Granville Road, Brent, northwest London.

The teenager died at the scene after police were called at around 11.30pm on Friday. His family have been informed, according to the police.

Another male, also believed to be 17, was taken to hospital, as well as a woman in her early 20s, who suffered a hand injury.

On Saturday, an 18-year-old man was arrested on suspicion of murder and taken into custody, as the Metropolitan Police called for anyone who may have witnessed the incident to come forward.

Rayan Assoui, 43, who lives nearby, said there have been many similar incidents in the area over the past few months.

He went on: ‘This area is getting worse, it’s not good, for this to happen to a young person is very sad.’

Officers are appealing for witnesses today(Picture: Ben Cawthra/LNP)

Detective Chief Inspector Mark Rogers of the Metropolitan Police said: ‘We believe that there was a fight following a birthday party, which would have been attended by a number of people.

‘I would urge anyone who was there, and who has not yet spoken with officers, to please come forward. It is vital that we establish what happened.’

Chief Superintendent Dan Knowles, in charge of the North West Command Unit, said: ‘I know that the community will be shocked by this incident in which a young man has lost his life.

‘We shall be working with our colleagues from Specialist Crime to ensure that this investigation proceeds as quickly and thoroughly as possible.’

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The teenager was stabbed to death at a party on Friday night.