Last week during a solo show in Philadelphia, Young showed the audience a guitar and said: "This was given to me by my good friend Stephen Stills. CSNY will never tour again, ever - but I love those guys."

On Friday, Crosby tweeted: "I hear Neil said 'there will never be any more CSNY shows.' That's like saying there are mountains in Tibet. We know, Neil. We already knew."

When questioned by fans as to an explanation for Young's comments, Crosby replied, "believe me, not going to happen", before adding, "he is very angry with me."