Collaborator Willie Nelson confirmed the news via Twitter

Chris Ethridge, bass player with country rock legends The Flying Burrito Brothers, has died at the age of 65.

Ethridge also played with the Willie Nelson Family Band, and it was Nelson who confirmed news of his bandmate’s death, via Twitter, writing:

The cause of Ethridge’s death has not yet been revealed, however, last week, musician Booker T Jones wrote on Twitter: “Just talked to Chris Ethridge, (Burritos, Willie Nelson), hospitalized in Meridian, MS – send love and hope – doctors say he will pass soon.”

Ethridge co-wrote a number of songs with fellow Flying Brother Brothers member Gram Parsons, who died in 1973, including Parson’s solo track, ‘She’. Both were also members of the International Submarine Band. The Flying Burrito Brothers released their debut album, ‘The Gilded Palace of Sin’, in 1969.

In the late 1970s, Ethridge became a well respected session player in the country rock world, working with the likes of Linda Ronstadt, Jackson Browne, Ry Cooder and Leon Russell.