Bono in tribute to tour manager
U2 frontman Bono has described the band's long-standing tour manager as a "legend" who is "irreplaceable" following his death.
Dennis Sheehan, who is believed to have been the rock group's tour manager for more than 30 years, was aged in his late 60s.
In a tribute, Bono said: "We've lost a family member, we're still taking it in. He wasn't just a legend in the music business, he was a legend in our band. He is irreplaceable."
Arthur Fogel, CEO at Global Touring and chairman at Global Music Live Nation Global Touring, said: "With profound sadness we confirm that Dennis Sheehan, U2's long-standing tour manager and dear friend to us all, has passed away overnight.
"Our heartfelt sympathy is with his wonderful family."
U2 are in the middle of their latest world tour iNNOCENCE+eXPERIENCE and are currently doing a string of shows in Los Angeles.
US website TMZ said Mr Sheehan died in his hotel room.
Los Angeles County Fire Inspector Chris Reade said the first responders were called at around 5.30am to reports of a man in cardiac arrest.
Mr Sheehan was pronounced dead at the scene.
Coroner's investigators are at the hotel.