Ozzy Osbourne’s cause of death released days after Black Sabbath star’s funeral The Irish IndependentOzzy Osbourne Died of a Heart Attack, Death Certificate Shows The New York TimesOzzy Osbourne died of cardiac arrest, death certificate says The GuardianKelly Osbourne thanks Ozzy’s fans for ‘support’ RTE.ieOzzy Osbourne’s official cause of death revealed after Black Sabbath legend died aged 76 just weeks after last show The Sun
