Chris Cornell, lead singer of Soundgarden and Audioslave, died Wednesday night after performing in Detroit reported by the Associated Press.

Cornell’s death, at age 52, was “sudden” and unexpected” and is being investigated as a “possible suicide,” a spokesman for the Detroit Police Department told AP.

A family friend called 911 around midnight Thursday after he went to check on Cornell and found the musician “unresponsive” on the bathroom floor at the MGM Grand hotel, spokesman Michael Woody said. Emergency medical personnel arrived, and Cornell was pronounced dead at the scene, he said.

Police told the New York Times that a white man whose birthday matches Cornell’s was found on a bathroom floor at MGM Grand with a band around his neck, but would not confirm the victim’s identity.

“We are moving in the direction of a possible suicide but we are waiting on the Medical Examiner’s Office to provide their report,” Woody said.

Cornell helped form Soundgarden in 1984. Soundgarden were one of the first bands to release music for storied label Sub Pop, who were at the center of the ’90s grunge movement. They came to broader attention with 1991’s Badmotorfinger, and exploded into full-on superstardom with 1994’s Superunknown and singles like “Black Hole Sun.” Soundgarden would break up in 1997, though they’d reunite to release a new album, King Animal, in 2012.

The Grammy-winning rocker had performed Wednesday night at the Fox Theatre in Detroit. Cornell ended his performance with a cover of Led Zeppelin‘s “In My Time of Dying.”

Keep up with the latest trending music news by following us on FacebookTwitter, and Instagram