The investigation stems from alleged videos from a Kneecap gig where the rap trio apparently shouted, “Up Hamas, up Hezbollah.” Per the BBC, both militant groups are banned in the U.K. and expressing support for them is a crime.

Hip hop Irish trio Kneecap is being investigated by UK counter-terrorism police after videos emerged allegedly showing the band calling for politicians to be killed and shouting “up Hamas, up Hezbollah.

London’s Metropolitan Police force has issued a statement saying that further investigation is needed regarding two controversial videos. Politicians are putting pressure on festivals to axe Kneecap from their line-ups,