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”.

British punk-rap duo Bob Vylan led chants against the Israeli military in a live BBC broadcast on Saturday. Irish-language rappers Kneecap also are being investigated.