Malcolm Young, guitarist and co-founder of Australian legendary rock band AC/DC, died Saturday at the age of 64. Young had been suffering with dementia for the past three years, an illness that forced his retirement from the Rock and Roll Hall of Fame-inducted band he founded with his brother Angus Young in 1973.

Tributes pour in for Malcolm Young, co-founder of the Australian rock band AC/DC, after he passed away aged 64.