Chris Cornell, frontman for Soundgarden, died Wednesday night. He was 52.

The cause of death is unknown and currently under investigation. Cornell was in Detroit at the time of his death, having performed a show with Soundgarden earlier in the evening. The band kicked off a North American headlining tour last month.

“His wife, Vicky, and family were shocked to learn of his sudden and unexpected passing, and they will be working closely with the medical examier to determine the cause,” reads a statement from Cornell’s publicist.

Soundgarden was at the forefront of the grunge movement of the 1990s, being the first grunge band to sign to a major label deal (1988). Their 1994 album Superunknown debuted at #1 on the Billboard chart and yielded the Grammy-winning singles “Black Hole Sun” and “Spoonman”. Cornell was also the lead vocalist and songwriter for Audioslave and founder and frontman for Temple of the Dog. He released five solo albums throughout his career.

Cornell’s most recent release is “The Promise,” written for the the film of the same name about the Armenian genocide.

Chris Cornell – “The Promise”:

Soundgarden – “Spoonman”:

Chris Cornell – “Nearly Forgot My Broken Heart”: