British police launched a criminal investigation Monday into a televised performance at the Glastonbury Festival by rap punk duo Bob Vylan, who drew intense criticism after they led crowds of music fans in chanting “death” to the Israeli military.

Members of the British rap punk duo Bob Vylan had their visas revoked by the US and are under investigation by local police after leading a crowd to chant “death” to Israel’s military at a UK music festival this past weekend.

U.K. police have officially launched a criminal investigation into Bob Vylan and Kneecap's Glastonbury performances from this past weekend.