PHOENIX, ARIZONA—Musician Chris Squire passed away on June 27 at the age of 67 after battling leukemia.

Squire announced that he had been diagnosed with acute erythroid leukemia in May.

He said in a statement at the time, “This will be the first time since the band formed in 1968 that Yes will have performed live without me. But the other guys and myself have agreed that Billy Sherwood will do an excellent job of covering my parts and the show as a whole will deliver the same Yes experience that our fans have come to expect over the years.”

Squire was bass guitarist and co-founder of British rock band Yes. Squire founded Yes in 1968 alongside singer Jon Anderson. The rock band took home a Grammy award in 1985 for Best Rock Instrumental Performance.

The band is known for songs that include, “Owner of a Lonely Heart,” “Roundabout,” “Heart of the Sunrise,” and more.

Keyboardist and member of the band Geoffrey Downes was first to announce the news. He tweeted, “Utterly devastated beyond words to have to report the sad news of the passing of my dear friend, bandmate and inspiration Chris Squire. #yes.”

The rock band confirmed the news of the rock star’s passing on its official Facebook page. The post read, “It’s with the heaviest of hearts and unbearable sadness that we must inform you of the passing of our dear friend and Yes co-founder, Chris Squire. Chris peacefully passed away last night in Phoenix Arizona. We will have more information for you soon.”

The band is currently scheduled to perform in August at the following locations: Newark, New Jersey, and Brooklyn, and New York.

Fans, colleagues, and friends took to social media their condolences to honor the musician.

Jimmy Stafford tweeted, “Saddened to hear of Chris Squire’s passing. A legendary bass player in one of my favorite bands. Condolences to his family.”

Musician Trevor Rabin wrote via Facebook, “Hi everyone, I am about as sad as I could be. You all I’m sure know by now that Chris has passed. I spoke to him about a week ago, and we were still laughing together. Even though he had recently taken a turn for the worse, this was not totally unexpected, and the shock and sadness is extreme. I will miss him terribly. An era is over. Music has lost a one of a kind, and I have lost a dear friend and brother. RIP.”

Artist Roger Dean took to Facebook, “Very sorry to hear the news that Chris’s died on Saturday night from leukemia. It was a great shock even though we were told it was likely. Chris was a huge force in Prog, in Rock and in Music, a major heartbeat has stopped. Chris will be missed by his family, by the band, by his millions of fans and friends and I will miss him.”

Squire is survived by his wife Scotty, and his five children: Carmen, Chandrika, Camille, Cameron, and Xilan.