Singer Ozzy Osbourne reportedly died of a heart attack when he passed away on July 22 at the age of 76. Cardiac arrest, coronary artery disease and Parkinson’s disease with autonomic dysfunction were also listed as causes in the death certificate, according to The New York Times and The Sun.

Additional details about heavy metal icon Ozzy Osbourne's death last month have surfaced, including his cause of death and additional factors.

The heavy metal rockstar died on July 22, weeks after he reunited with his Black Sabbath bandmates for the band's final performance.