Famed singer-songwriter Paul Simon has announced he had to cancel his planned Saturday and Sunday concerts in Philadelphia because his "chronic and intense" back pain had become "unmanageable."

Paul Simon has canceled two concerts this weekend, according to a statement released just hours before a performance scheduled for Saturday night (June 28) at the Academy of Music in Philadelphia. Simon was set to play the venue both Saturday and Sunday night.

A statement posted to the singer’s official Instagram account revealed he would be undergoing a “minor surgical procedure” in the coming days.