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.

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.