Leonardo Reid, 15, was killed during the music video shoot in Archway, north London on Thursday evening.

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The youngster was found with stab wounds at around 11.30pm and pronounced dead at the scene shortly after midnight.

An unnamed man, 23, was taken to hospital with stab wounds – where he was also pronounced dead.

Two men, aged 17 and 22, were arrested yesterday evening on suspicion of murder and attempted murder.

The pair were held in custody at a police station in north London.

A man, 46, was also arrested last week on suspicion of murder and attempted murder after the alleged knife attack.

He was later released with no further action.

A large number of witnesses are thought to have been at the rap video shoot on Thursday.

Chief Superintendent Andy Carter said: “My thoughts are with the families of the two victims who have suffered such an unimaginable loss in this shocking and unacceptable incident.

“We will support our colleagues as they investigate and members of the public will see an increased policing presence in the area.

“I urge anyone who has information that can help us establish exactly what has happened to approach those officers or contact us immediately.

“We are committed to work with our power partners to tackle street violence, but we can’t do this alone.

He added: “If you can help this investigation please do get in touch. We know that some people may be hesitant at coming forward with information.

“But you can share what you know anonymously by independent charity Crimestoppers, who will not even ask for your name.

“This is an area of rich community spirit and we thank the local people for their cooperation and assistance.

“As our specialist crime police progress investigation will provide further updates and specs of the incident as it becomes available.”

Anyone who has information that could help police should call 101 or tweet @MetCC ref CAD 9383/29 Jun.