A DOUBLE murder probe has been launched after two people including a 15-year-old boy were stabbed to death "as a music video was filmed".
Police were scrambled to Islington, North London, at around 11.30pm yesterday following reports of a stabbing.
The teen boy, believed to be 15, was declared dead at the scene shortly after.
A 23-year-old man taken to hospital with stab wounds also died in the bloodbath.
Police confirmed a third victim, a 28-year-old man, remains in hospital after being found at an address with a knife wound.
His condition is not believed to be life threatening.
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The Met said no arrests have been made following the horror, which took place in front of a "large number of people".
A Section 60 Order granting police additional stop and search powers has been authorised.
The next of kin for both victims have been identified with specialist officers supporting the families.
Witnesses claim that a music video was being shot in the park when a fight broke out.
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Regina Agyeiwaa, 54, told the Evening Standard: "There was filming and then all hell let loose.
"There were a lot of kids, some very young hanging around. It's a tragedy we are all shaken."
She added: "There were paramedics at the scene working hard. I saw a bloody pair of jeans on the road, it was just horrible. For this to happen in our doorstep is terrifying."
One man, who wished not to be named, saw around 40 people listening to loud music as they loitered in the street where they had parked luxury cars, including Mercedes and Audis.
They appeared to be filming on their phones until a fight broke out and he called the police.
Another woman, describing a similar scene, said the group were just "hanging around", adding: "All of a sudden I heard a commotion.
"I heard one of them shout, 'get up' - that's when I realised he was on the floor."
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.
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"A man and boy have lost their lives and we must now work together to identify those responsible and remove them from our streets."
Anyone with information can call police on 101 or tweet @MetCC ref CAD 9383/29 Jun.
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