Chris Cornell, lead singer of Soundgarden and Audioslave, died Wednesday night, his representative told CNN.
Bumbery called the death "sudden and unexpected" and said his wife and family are in shock. The exact cause of his death is yet to be determined.
Bumbery said Cornell's family thanked his fans for their continuous love and loyalty.
In interviews, Cornell discussed his past struggles with alcohol and the impact of his friends' deaths from substance abuse.
Cornell began his career in the Seattle rock scene forming the band Soundgarden in 1984, which was influential in the 1990s grunge movement.
The band, who had released hit songs and found success, marked a mainstream breakthrough with "Superunknown", its 1994 album that won them two Grammys, sold more than five million units in the US, and launched five hits, including "Black Hole Sun", one of the most popular alternative rock songs from the 1990s. With the arrival of drummer Scott Sundquist, Cornell moved to singing full-time and the next year they recorded three songs for the pivotal Deep Six compilation, which placed them alongside fellow grunge architects Melvins and Green River, the latter of which contained future Pearl Jam and Mudhoney members. Soundgarden is best known for its songs "Black Hole Sun", "Spoonman" and "Fell on Black Days".
In addition to his work with these groups, Cornell also released four solo albums and a live album of his own work.
The band split in 1997, which is when Cornell went solo.
Audioslave disbanded in 2007, but Cornell and Soundgarden reunited in 2010 and released the band's sixth studio album, "King Animal" in 2012.
Detroit police say the death of rocker Chris Cornell, the lead singer of the bands Soundgarden and later Audioslave, is being investigated as a possible suicide.
In the intervening years, Cornell dropped his solo disc "Euphoria Morning" in 1999, which reaped him a Grammy bid for Best Male Rock Vocal Performance for the single "Can't Change Me".