More than 90 police officers have staged a raid at a rave in a warehouse in north London.
They reportedly stormed the party in Hodcomb Lane, Islington, at 2am this morning after receiving a call from a member of the public reporting 'drug taking and offensive behaviour'.
At least three people were detained and taken into custody for drug possession and one for drugs supply.
Police in riot gear stormed the party in Hodcomb Lane, Islington, at 2am this morning after receiving a call from a member of the public reporting 'drug taking and offensive behaviour'
Police said the police presence is there to reassure the public
South London Ambulance Service also attended, along with West London's North London Response Unit.
Officers have now confirmed that the raid was not for drug dealing or disorder, and added that this does not signal an escalation in activity in the area.
The operation was carried out after police said they received a telephone call about 'drug taking and offensive behaviour'.
A Scotland Yard spokesman said: 'South London Ambulance Service attended in attendance and all the patients were taken to hospital as a precaution.
'Three people were detained and taken into custody for drug possession and one person for drugs supply.
'Police presence is there to reassure the public'.
Residents living next to the warehouse said they were awoken at around 2am by a police car, an officer in full combat gear, and two helicopters.
They claimed the noise they had heard was louder than usual.
A 51-year-old neighbour who asked not to be named said: 'I live in a quiet area. When I heard the helicopter, the sound of the propellers, the sounds like this.
'They put the lights on and then I saw the police on the roof of the building. And then I heard the noise of the helicopter. I came downstairs and I heard about 15 to 20 police cars and about eight helicopters circling.'
Other witnesses said they had heard 'two helicopters flying over' the warehouse.
A 24-year-old man was arrested on suspicion of drug supply after Police raided the party
A 51-year-old woman was arrested on suspicion of supplying drugs
David Greenhalgh, 34, a delivery driver and regular at the warehouse, said: 'That seems a bit odd. I was listening to the sound of one helicopter and I just heard "splash, splash, splash" then another noise.
'I think one helicopter is loud and then another one is even louder. It's like they're just flying around the warehouse trying to catch someone.
'It didn't look right. They didn't come out like they should have. I've seen the police cars and they didn't come out on the fire trucks and they didn't even come out with the less fancy police cars. It seemed strange to me.'
A man and a woman were arrested in connection with drugs related offences
Other neighbours claimed the noise was louder than usual
Dave Watts, a local DJ, told the Evening Standard: 'What is going on? Police dogs?
'I've been DJing at Hodcomb Lane for around two years and I'm used to noise, but these are loud.
'The events I've DJ'd have always been nice and encouraging with people happy to support local outfits.
'Why would they need to do this in broad daylight? It's odd. I've just spoken to a couple of the attendees who told me police were happy to talk to everyone.'
It is believed more than 100 police officers attended.