Chester Bennington of Linkin Park performs on stage at the iHeartRadio Album Release Party presented by State Farm at the iHeartRadio Theater Los Angeles on May 22, 2017.

:: The death of Linkin Park frontman Chester Bennington came as a surprise to the world when it was announced, but it also struck similarities to the death of fellow rocker and close friend Chris Cornell, who killed himself in May.

Authorities are investigating Bennington’s death as an apparent suicide, Los Angeles County coroner spokesman Brian Elias said Thursday. Bennington, who was 41, was found dead in his home near Los Angeles. He had a strong bond with Cornell and died on what would have been the Soundgarden singer’s 53rd birthday.

Bennington was also the godfather to Cornell’s 11-year-old son, Chris. And Bennington sang Leonard Cohen’s “Hallelujah” at Cornell’s memorial.

The Cornells called Bennington a member of their family in a statement released Thursday. “The Cornell family is overwhelmed by the heartbreaking news about Chester Bennington which tragically comes so soon after their family’s own loss,” said a Cornell family spokesperson. “They open up their loving arms to Chester’s family and share in the sorrow with all those who loved him.”

Cornell died by hanging after a concert in Detroit. Linkin Park was set to go on tour next week.

Bennington helped Linkin Park, whose sound mixed rap and rock, become one of the most commercially successful acts in the 2000s. The Grammy-winning group sold more than 10 million copies of their 2000 debut, “Hybrid Theory,” which featured the megahit and anthem, “In the End.” They sold another 6 million with 2003’s multiplatinum “Meteora.” Both albums explored feelings of frustration and fury.

The success helped Linkin Park become Billboard’s No. 1 act of the decade for rock songs and alternative songs.

Band co-founder and producer Mike Shinoda said on Twitter he was “shocked and saddened.”

“Chester Bennington was an artist of extraordinary talent and charisma, and a human being with a huge heart and a caring soul. Our thoughts and prayers are with his beautiful family, his band-mates and his many friends,” Warner Bros. Records CEO and Chairman Cameron Stang said in a statement.

Bennington’s voice could soar with piercing strength or descend to a whisper. Rolling Stone once called it a “shrapnel-laced howl that sounds like it comes from someone twice his size.”

The band also sold millions with its remix album, “Reanimation,” and its mash-up record with Jay-Z, “Collision Course.” They won Grammys for best hard rock performance in 2001 for “Crawling” and best rap/sung collaboration for “Numb/Encore” in 2005. Linkin Park was next scheduled to perform next week in Massachusetts and New York.

Bennington struggled with drug and alcohol addictions at various times during his life. He said he had been sexually abused as a child and was homeless for months before the band found fame.

Linkin Park released their most recent album, “One More Light,” in May. It was an album that divided critics and fans alike for its embrace of moody pop. One song on the album, “Heavy,” opens with the words: “I don’t like my mind right now.”

Although the band had always experimented with different sounds, some claimed Linkin Park had sold out, which Bennington denied. “One More Light” became the band’s fifth No. 1 album debut on the Billboard 200 albums chart.

“If you like the music, fantastic. If you don’t like it, that’s your opinion too. Fantastic. If you’re saying we’re doing what we’re doing for a commercial or monetary reason, trying to make success out of some formula. then stab yourself in the face!” Bennington told NME magazine.

When he got his big break in 1999, Bennington was an assistant at a digital-services firm in Phoenix. A music executive sent him a demo from the band Xero, which needed a lead singer. (He had been recommended by his attorney.) Bennington wrote and recorded new vocals over the band’s playing and sent the results back. He soon got the gig and the band then changed its named to Hybrid Theory, then Linkin Park.

Bennington told The Associated Press in 2010 that because of the sound the band is known for – fusing sounds from nu-metal, punk, rock, pop and hip-hop – it was virtually impossible to satisfy their many kinds of fans.

“We’re making music for us, that we like. We’re not making music for other people,” he said. “We’re not thinking, ‘Let’s make a pie-graph of all our fans and find out how many people fit in whatever category and then make the perfect album for them.’ Like, that would be absolutely ridiculous.”

Bennington was married to his second wife, Talinda, and is survived by six children.

Musician Chester Bennington performs with the Hellcat Saints at the 2016 Rhonda’s Kiss Benifit honoring Johnny Depp at El Rey Theatre on November 3, 2016.

Chester Bennington (L) walks to the podium to sing during the memorial service for Soundgarden frontman Chris Cornell, May 26, 2017.