The singer reportedly died on what would be Chris Cornell's 53rd birthday.
Linkin Park singer Chester Bennington was found dead on Thursday morning. He was 41.
A spokesperson for the L.A. County Coroner's Office confirms to ET that Bennington's death is being investigated as a possible suicide. The coroner is currently on the scene at a private residence in Palos Verdes Estates in the Los Angeles area.
Bennington has been married to Talinda Bentley since 2006. He has six children, some from his previous marriage to Samantha Olit.
The singer was friends with the late Chris Cornell, whose death was ruled a suicide by hanging in May, and performed at the Soundgarden frontman's funeral. Thursday, July 20, would have been Cornell's 53rd birthday.
ET has reached out to reps for both Bennington and Linkin Park.
WATCH: Remembering Chris Cornell: ET's Favorite Moments With the Late Soundgarden Singer
If you or someone you know needs help, please call the National Suicide Prevention Lifeline at 1-800-273-TALK (8255).