Graham Nash doesn't want "anything to do" with his former bandmate David Crosby.

Graham Nash

Graham Nash

The ongoing feud between the pair was brought to light earlier this month when he confirmed in his autobiography that he hadn't been getting along with David "for some time".

But the feud has taken a turn for the worse after Nash 74, told a Dutch magazine his involvement in Crosby, Stills and Nash was over, and in an interview with Billboard he confirmed he would "never" make another record or show with the band.

Speaking to Lust For Life magazine, he said: "Right now, I don't want anything to do with Crosby at all. I don't like David Crosby right now. He's been awful for me the last two years, just f***ing awful. I've been there and saved his f***ing ass for 45 years, and he treated me like s**t. You can't do that to me ... when it goes on longer, and I keep getting nasty emails from him, I'm done. F**k you. David has ripped the heart out of Crosby, Stills, Nash and Young."

The fallout is said to have happened when Crosby got involved in a personal feud with Neil Young - something which is thought to have caused the end of folk/rock supergroup Crosby, Stills, Nash and Young (CSNY).

But mystery still surrounds the exact details of what Crosby has done to further fuel the rift and make Nash, a former member of The Hollies, question the band's future.

Although it doesn't look like Nash is going to forgive and forget just yet, Crosby, 74, who was also founding member of The Byrds, has since apologised to Young for comments he made about his girlfriend Daryl Hannah.