Malcolm Young, one of the founding guitarists of AC/DC, has died, his family has confirmed in a statement. He was 64 years old. Young retired from the band in 2014; at the time, his family stated that he was suffering from dementia. The musician had a bout with lung cancer in 2008, at the conclusion of AC/DC’s tour behind Black Ice, which was treated successfully. Young also suffered from an unspecified heart condition, which required him to have a pacemaker. While a specific cause of death was not made immediately available, the family’s statement references his dementia and said he “passed away peacefully on Saturday with his family by his bedside.”

“Renowned for his musical prowess, Malcolm was a songwriter, guitarist, performer, producer and visionary who inspired many,” the statement reads. “From the outset, he knew what he wanted to achieve and, along with his younger brother, took to the world stage giving their all at every show. Nothing less would do for their fans.”

In 1963, Malcolm and Angus Young's family moved from Scotland to Sydney, Australia, where the brothers formed AC/DC. It was reportedly Malcolm's idea to build a “no-nonsense” rock band around his livewire brother Angus. They played their first gig on New Year’s Eve 1973. AC/DC became one of the most popular rock bands in history, gaining hits with “Highway to Hell,” “Back in Black,” “You Shook Me All Night Long,” and so many others. Their first No. 1 album in the U.S. was For Those About to Rock (We Salute You). In 2008, they won their first Grammy for “War Machine,” which won Best Hard Rock Performance.