LONDON (AP) — U.K. police announced Monday that the weekend performances by rap punk duo Bob Vylan and Irish-language band Kneecap at the Glastonbury Festival are subject to a criminal investigation after they led crowds in chants calling for “death” to the Israeli military and chants of “Free Palestine.”

British police have announced that the weekend performances by rap-punk duo Bob Vylan and the Irish-language band Kneecap at the Glastonbury Festival are subject to a criminal investigation after they led crowds in chants calling for “death” to the Israeli military and a “free Palestine”.

During Bob Vylan’s set, the band’s singer Bobby Vylan (born Pascal Robinson-Foster) led Glastonbury crowds in chants of both “free, free Palestine” and, more controversially, “death, death to the IDF.”