(CNN) Musician Tom Petty died of an accidental drug overdose of several medications, a statement from his family, posted on tompetty.com, and a news release from the Los Angeles County Medical Examiner said Friday.

The family statement, which also was posted on Facebook, said Petty, 66, had suffered several ailments before his October 2 death.

Tom Petty died October 2.

"Despite this painful injury he insisted on keeping his commitment to his fans and he toured for 53 dates with a fractured hip and, as he did, it worsened to a more serious injury.

"On the day he died he was informed his hip had graduated to a full-on break and it is our feeling that the pain was simply unbearable and was the cause for his over use of medication," according to the statement from Dana Petty, his wife, and Adria Petty, his daughter.

The medical examiner's news release said the autopsy found these drugs in Petty's system: fentanyl, oxycodone, acetyl fentanyl and despropionyl fentanyl, which are opioids; temazepam and alprazolam, which are sedatives; and citalopram, an antidepressant.

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