Chris Squires, the longtime bassist for the rock band Yes, has died, according to a statement on the group's official Facebook page. He was 67.

The English musician revealed recently that he was suffering from a rare form of leukemia.

Born in London, Squires formed Yes, which became known for its symphonic style of rock music, with Jon Anderson in 1968. Soon guitarist Peter Banks, keyboardist Tony Kaye, and drummer Bill Bruford joined the pair and they released their self-titled first album in 1969. The band found commercial success in 1971 with their third and fourth albums, The Yes Album and Fragile, the latter of which featured "Roundabout," arguably the band's best known song.

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While the band continued to change members, Squires was the only one to remain as bassist over the last five decades. Current keyboardist Geoff Downes tweeted about the news, writing:

Squires is survived by wife Scotty and children Carmen, Chandrika, Camille, Cameron, and Xilan.