Ozzy Osbourne, the heavy metal and reality television star, died of a heart attack and had suffered from coronary artery disease and Parkinson’s, according to a death certificate filed at a registry in London.

Ozzy Osbourne died from a heart attack and suffered from Parkinson’s and coronary artery disease, according to a death certificate filed in London and obtained by the New York Times. The certificate,

Osbourne, the legendary frontman of Black Sabbath and a pioneer of heavy metal, died July 22 at his home in Buckinghamshire, England.