Graham Nash has opened up about the future of Crosby, Stills & Nash and says his legendary group is likely finished.

Nash said that he and Crosby are on "awful" terms and that he laments the band's split.

"You asked me if there's more of CSN? My answer is 'no,' and that's very sad, because we're pretty good.

But I don't like David Crosby right now. He's been awful to me these last two years, just f—ing awful."

He adds, "I've been there and saved his f**ing a** for 45 years," he continued, "and he treated me like s***.

You can't do that to me. You can do it for a day or so, until I think you're going to come round.

But when it goes on longer, and I keep getting nasty emails from him, I'm done. F*** you."

In 2014 Crosby publicly called Neil Young's girlfriend a "poisonous predator," to which the rock legend said he was permanently finished with CSNY.