Soundgarden and Audioslave frontman Chris Cornell has died. He was 52-years-old.

In a statement to The Associated Press, Cornell’s representative Brian Bumbery says the singer’s death was “sudden and unexpected.” A cause of death has yet to be revealed. Cornell’s family request for privacy as they work with a medical examiner to determine the cause.

Cornell was on tour with Soundgarden and The Pretty Reckless in Detroit.