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Davy Jones, lead singer of '60s pop band The Monkees, has died at the age of 66.
ET confirms that Jones passed away Wednesday in Florida after suffering a heart attack. The Martin County Sheriff said detectives were conducting a full death investigation, but there were no signs of any suspicious circumstances surrounding his death.
The '60s star is survived by his third wife, Jessica Pacheco-Jones, and four daughters from previous marriages. Authorities said Jones had complained earlier Wednesday that he was not feeling well and was having trouble breathing. He was transported to a hospital near his home in Hollywood, FL, but was not successfully resuscitated.
"All of his family, friends and fans mourn Davy's loss," said Joseph Pacheco, Jones' manager and brother-in-law. "We were fortunate to have such an incredible human being in our lives. Sadly, his time on earth was cut far too short and he will be missed tremendously by all who knew him."
Jones was a British member of The Monkees, a pop group created for the U.S. television series of the same name which ran from 1966-1968. The band -- which also included members Micky Dolenz, Michael Nesmith and Peter Tork -- had several memorable hits including Daydream Believer, Last Train to Clarksville and Pleasant Valley Sunday.
Tork issued the following statement on his Facebook page: "It is with great sadness that I reflect on the sudden passing of my longtime friend and fellow adventurer, David Jones. His talent will be much missed; his gifts will be with us always. My deepest sympathy to Jessica and the rest of his family. Adios, to the Manchester Cowboy. Peace and love, Peter T."
Singer David Cassidy, who also rose to fame on a TV show -- the '70s musical/sitcom The Partridge Family -- quickly reacted to the news. "I'm terribly saddened about the passing of Davy. I have the utmost respect for him as an artist and person." The 61-year-old Cassidy --who had been scheduled to co-headline with Jones on an upcoming tour -- said he'll be honoring the late singer by doing a tribute in his shows and performing some of his biggest hits.