A man has died after collapsing at the Creamfields festival, police said.
The 26-year-old was found collapsed in a campsite at the dance music event at Daresbury, near Warrington, Cheshire Police said.
He was discovered at around midnight on Saturday but emergency services were unable to save him.
The four-day festival, which started on Thursday, includes performances from stars including Calvin Harris, Tiesto, Fatboy Slim and Pete Tong.
A Cheshire Police spokesman said: "Last night we were notified following concerns for a man in one of the campsites and, sadly, a 26-year-old man from the Cornwall area passed away.
"Formal ID is to take place and we are awaiting the results of the post mortem examination to establish the cause of death. Our thoughts are with his family at this time."
He added: "Officers continue to take positive action against those who risk others' lives by attempting to bring illegal drugs onto site. The Constabulary wants to remind people that drug supply at Creamfields will not be tolerated, and officers will take robust action where necessary."