Linkin Park lead singer Chester Bennington has died aged only 41.
He was the lead vocalist of the rock band since the late 1990s.
His death may have been a suicide, according to TMZ.
He was apparently found dead in Palos Verdes Estates, Los Angeles, at about 9am local time.
Bennington struggled with depression for many years.
#Breaking Linkin Park singer Chester Bennington has died, the Los Angeles County coroner has said
— Press Association (@PA) July 20, 2017
He was born in Phoenix, Arizona, and was also the lead singer of bands Dead by Sunrise and cover group Bucket of Weenies.
Linkin Park’s albums Hybrid Theory and Meteora were both highly influential.
Bennington was good friends with singer Chris Cornell, who committed suicide earlier this year.
The Linkin Park man even sang Leonard Cohen’s Hallelujah at the Audioslave front man’s funeral.
.@ChesterBe & Brad performed 'Hallelujah' at Chris Cornell's funeral. Heartbreaking performance ? #RIPChrisCornellhttps://t.co/vY8rUKSW4n pic.twitter.com/p3WnNWcBHp
— Linkin Park Live (@LPLive) May 26, 2017
Tributes have been flooding in online.
I saw @linkinpark at Projekt Revolution in Tampa & I have never seen an artist throw themselves into performance like #ChesterBennington ?
— anomaly alice (@anomalyalice) July 20, 2017
Heartbroken. If you ever feel hopeless, don't be afraid to reach out and call someone. https://t.co/XxfyGt7SzQhttps://t.co/ouUHcfGZro
— Katrina Garsten (@HiWaffles) July 20, 2017
Chester Bennington, lead singer of Linkin Park, has died at age 41 by suicide https://t.co/Lxsho6KxjS pic.twitter.com/4IZ75oXqBA
— Rolling Stone (@RollingStone) July 20, 2017
Unreal! Heartbroken! RIP Chester Bennington from Linkin Park. An amazing talent, gone way too soon! A voice for a generation. #LinkinPark! pic.twitter.com/WRkQZ3y0go
— Eric West (@EricXWest) July 20, 2017
Incredibly sad news about Chester Bennington. His voice and band a huge inspiration to so many. Thoughts with his family & LP x
— Josh Franceschi (@joshmeatsix) July 20, 2017
RIP Chester Bennington of Linkin Park. I do what I can to spread mental health awareness. WE ALL MUST DO MORE. #EnoughIsEnough ??
— Mauro Ranallo (@mauroranallo) July 20, 2017