Reports that Tom Petty had died at the age of 66 have been refuted following the rocker's heart attack earlier today.

Petty was reportedly found unconscious at his Malibu home, TMZ,com reported.

After being rushed to hospital, his life support was turned off, and CBS News quoted a Los Angeles Police Department source confirming his death.

However, the police report has been refuted and TMZ.com says he is "clinging to life".

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In a series of tweets, the LAPD apologised for the mistake.

TMZ.com reported a "do not resuscitate order" had chaplain had been called to Petty's room, and he was "not expected to live throughout the day".

Earlier, Petty was found unresponsive at his Malibu home. Paramedics reportedly found a pulse and Petty was taken to UCLA Santa Monica Hospital.

However, no brain activity was found and the decision was made to turn off his life support.

At his last show, at the Hollywood Bowl on September 15, Petty reportedly told the crowd: "I want to thank you for 40 years of a really great time."

Petty has released 13 albums with his band The Heartbreakers, along with three solo albums. His last was Hypnotic Eye in 2013.

Last week, the singer concluded his tour - which began in April earlier this year - at the Hollywood Bowl, and he previously admitted the run on the road would likely be his "last big one".

He told Rolling Stone: "We're all on the backside of our 60s... I have a granddaughter now I'd like to see as much as I can. I don't want to spend my life on the road. This tour will take me away for four months. With a little kid, that's a lot of time."

Tom Petty performs with Tom Petty and the Heartbreakers during one of his last shows in San Diego, California. Photo/AP
Tom Petty performs with Tom Petty and the Heartbreakers during one of his last shows in San Diego, California. Photo/AP

Along with his group, Tom Petty and the Heartbreakers became stars in 1976, going onto have a string of hits over a number of decades.

His biggest songs include Free Fallin', I Won't Back Down, Learning to Fly, American Girl, Refugee and I Won't Back Down.

Tom Petty performs during one of his last shows in San Diego, California. Photo/AP
Tom Petty performs during one of his last shows in San Diego, California. Photo/AP

He also spent time as a member of The Traveling Wilburys in the 1980s, and the supergroup boasted Bob Dylan, Roy Orbison, George Harrison and Jeff Lynne amongst its members