The Irish rap trio has drawn widespread criticism in recent months, with U.K. politicians condemning the choice to allow them to perform at the musical festival.

A criminal investigation has been launched over performances by Bob Vylan and Kneecap at Glastonbury on Saturday, Avon and Somerset Police has said. The force said it had appointed a senior detective to investigate whether comments made by either act amounted to a criminal offence after reviewing footage.

The BBC has revealed how it plans to show Kneecap ’s Glastonbury performance later today. The corporation has confirmed that the performance will not be streamed live but will be shown on-demand.