Yes co-founder and progressive bass legend Chris Squire died in Phoenix, Arizona, this past Saturday night.
In May, Squire, who was 67, revealed that he had been diagnosed with acute erythroid leukemia, which sidelined him for the band's summer co-headlining tour with Toto.
Current Yes keyboardist Geoffrey Downes tweeted:
"Utterly devastated beyond words to have to report the sad news of the passing of my dear friend, bandmate and inspiration Chris Squire."
"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," said a statement on the band's official website.
As a founding member of the renowned prog rockers, the London born bassist had remained a permanent fixture of the band 47 years and retained ownership of the name (Yes) during the turbulent late 80s, when the group splintered and various members left to form Anderson Bruford Wakeman Howe.
Squire was also the only member to feature on every of Yes’s 21 studio albums, from their debut, "Yes" (1969), to "Heaven & Earth" (2014) and also helped to write much of the band’s material.
Squire’s instrument of choice was his 1964 Rickenbacker which he played throughout his career.
Steve Howe & Chris Squire Old Grey Whistle Test 1975