Several others had been injured at the scene
Police have arrested a man on suspicion of murder after a man was killed at a pool party in Surrey.
Several other people are believed to have been seriously injured at the gathering, which was advertised online.
Locals said they were woken in the early hours by the sound of cars honking their horns as they tried to get away from the house - which is thought to have been rented out specifically for the party.
Surrey police said officers were called to the address in Church Lane in Headley shortly after 2.30am following reports of a disturbance. They found the body of the victim who was declared dead at the scene.
Neighbours said the bungalow in the quiet village is owned by a property developer who rents it out for parties and there had been concerns raised about previous events.
Nick Woolley, who lives nearby, said: " There was a very loud private party in a house very close to the church which started at 5pm and I was awoken by very loud music, rap-style. I was woken at 2.30am by cars honking their cars, trying to get away from it. It was a very loud party with a DJ which was disturbing anyone near it."
"About 3am a police helicopter was overhead and it was circling for 45 minutes. The village is now swarming with police," he added.
The party was advertised in advance as "The Big Mansion Pool Party Called My League - Part 3" with tickets £20 on the night.
The promoters - known as Krissy The Female Boss and Braintear Spookie - had been regularly posting about the event on social media in the days leading up to it.
No arrests have been made but police say there is no ongoing risk to residents in the area. The area was cordoned off and was expected to remain closed for several hours while the investigation continued.
Police want to speak to anyone who was at the party and may have seen the incident.
The victim has not yet been formally identified and a post-mortem examination to establish the cause of death will be held.