British police are weighing an investigation after musicians Bob Vylan and Kneecap made anti-Israeli comments onstage at Glastonbury Festival.

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.

The Israeli Embassy to the U.K. said it was “deeply disturbed by the inflammatory and hateful rhetoric expressed on stage" at Britain's largest music festival.