The father of a member of one of the headline acts at Glastonbury collapsed and died at the festival, hours after watching his son's group perform.
Muse headlined the festival's third and final night
Bill Howard, 62, from Teignmouth in Devon, father of Muse drummer Dominic, collapsed near the main Pyramid stage at 0115 BST on Monday.
He was taken to the festival's medical centre where he died at 0145 BST of a suspected heart attack.
A police spokesman said the death was not being treated as suspicious.
The popular Devon band were the top act on the third and final night of the three-day event.
A statement released on behalf of the band read: "It is with great sadness that we announce that Mr Bill Howard, father of Muse drummer Dominic, died earlier this morning at the Glastonbury Festival.
"Our sincere and heartfelt sympathy extends to Dominic and the Howard family."
The band has cancelled their show in Bergamo, Italy, on Wednesday with decisions on other shows pending.
Mr Howard was the second person to die at the three-day festival - Neil Clinnings, 24, from the Cleveleys area of Lancashire, was found collapsed in a car park in the early hours of Saturday.
He died shortly afterwards. His death is believed to be drug-related.
Two women, aged 29 and 30 and from Swindon, who were arrested on suspicion of supplying class A drugs have been released on police bail.