A 19-year-old died after falling ill at Creamfields dance music festival.
At around 12.15am on Saturday medical staff at the Daresbury, Cheshire festival told police that a man needed medical attention.
The Warrington teenager had been spotted looking unwell by staff patrolling the site.
He was whisked to a nearby medical tent to be assessed by a doctor before he was put in an ambulance and taken to Warrington District General Hospital.
Despite the best efforts of medical staff he later died at the hospital.
Detective Inspector Alistair Hinze said: “There do not appear to be any suspicious circumstances surrounding the death.
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“A file will prepared for the coroner and our thoughts are with the family at this incredibly difficult time.”
His family have been informed.
A post-mortem will take place in due course to establish the cause of death.
A Creamfields spokesperson added: “We are deeply saddened to hear of this tragic accident.
“We send our deepest condolences to his loved ones and we continue to work closely with the authorities.”
Creamfields is the biggest festival dedicated to dance music in the UK.
This year’s acts include Calvin Harry, Annie Mac and the Chemical Brothers.