Organizers of the Glastonbury Festival said Sunday they are "appalled" by the onstage statements of the punk duo Bob Vylan, whose singer led the crowd in a series of chants including "Death, death to the IDF" and "Free Palestine" the day before.

U.S. State Department bans visas for rap-punk duo Bob Vylan, following controversy over 'death to the IDF' chants during the group's Glastonbury performance.

On Saturday, the English punk duo led concertgoers in a chant of "death, death to the IDF," referring to the Israel Defense Forces.