Chris Cornell: Audioslave and Soundgarden singer dies aged 52

The group's defining moment was a 2005 concert in Cuba, which at the time was billed as the country's first outdoor rock concert by an American band.

A full autopsy report was not yet completed Thursday afternoon.

The founder of Audioslave died in Detroit, Michigan. The Detroit News cited Freeman in a similar report.

"Cornell, the lead singer of Soundgarden and later Audioslave, had appeared upbeat on his Twitter feed before Wednesday's show, posting a picture of the outside of the Fox Theatre in Detroit where they were playing with the caption: "#Detroit finally back to Rock City!

Wayne County spokeswoman Lisa Croff said Thursday morning that the autopsy is being conducted by the county Medical Examiner's office. The first grunge band to sign a record contract with a major label, Soundgarden played a paramount role setting in motion the cultural winds of the grunge wave that shaped alternative culture in the 1990s. The police would not confirm that the victim died of a suicide, though the preliminary determination was an "apparent suicide", Mr. Freeman said. Bumbery has stated the late frontman's family "working closely with the medical examiner to determine the cause". He was discovered just past midnight at the MGM Grand Detroit, according to police.

"Chris Cornell he's like 12 years younger than me, he's my friend and we'd go out together for dinner".

That friend was then forced to open Cornell's hotel room door where he was found dead in the bathroom with something around his neck.

Cornell teamed up with Aldean for a collaboration at the 2014 CMT Artists of the Year ceremony to perform Aldean's "Just Gettin' Started", which reached No. 1 on Billboard's Country Airplay chart when it was released as the second single from Aldean's 2014 album Old Boots, New Dirt. "The body was transferred to the medical examiner's office and the cause of death will be determined".

Cornell's representative Brian Bumbery made a statement to the Associated Press that his death was "unexpected" and "sudden" and that Cornell's wife and family were in shock.

The manager of the musician claimed that his death occurred unexpectedly saying that his wife family are in shock.

He eventually became a Grammy victor with Soundgarden, formed in 1984 and coming out of the rapidly growing Seattle music scene, which included Nirvana, Pearl Jam and Alice in Chains.

Cornell pursued a solo career after Soundgarden broke up in 1997.

During his final performance, Cornell told the crowd that they had been a great audience and that it would be tough for the crowd at the next show.