Former 3 Doors Down guitarist Matt Roberts died Saturday, just hours before he was supposed to perform at a benefit concert in Wisconsin, CNN reports. He was 38.

According to CNN, Roberts' father, Darrell, had traveled with his son to West Bend, where Roberts was scheduled to play at Rockin' for Heroes, a fundraiser for veterans, this weekend.

>> PHOTOS: Notable deaths in 2016

"I was wakened at 8:50 (Saturday) morning by some detectives beating on my door," Darrell Roberts told CNN. "It's always scary as a parent; they were in suits and that's when they told me."

Roberts' cause of death was not yet known, but his father told CNN that the guitarist, who left 3 Doors Down in 2012 because of "health issues," was addicted to prescription drugs.