Two weeks after he died at his home in Buckinghamshire, England, Ozzy Osbourne ’s cause of death has been revealed. According to a death certificate detailed by The New York Times on Tuesday, the two-time Rock & Roll Hall of Fame inductee and reality star died of a heart attack on July 22.

Legendary Black Sabbath frontman Ozzy Osbourne 's cause of death was a heart attack, his death certificate shows. The heavy metal icon died on July 22 at age 76, at Harefield Hospital in the United Kingdom.