Guns N' Roses have pulled out of their May 30 appearance at Rock in Rio - Lisbon.
In an official statement, singer Axl Rose blamed the cancellation on former guitarist Buckethead, who quit the band earlier this year.
"The band has been put in an untenable position by guitarist Buckethead and his untimely departure," Rose said. "I apologize to the fans who planned to see us at Rock in Rio - Lisbon. The festival and its tradition mean a lot to me personally and I sincerely do not enjoy being robbed by one of our own of the opportunity to be the first artist to play it for the third time."