Irish folk band The Mary Wallopers say they were muted at a music festival in Portsmouth, England on Friday for displaying a Palestinian flag during their set, something denied by organizers.

Organisers of the festival initially claimed that the band’s set was cut short for using a chant “widely understood to have a discriminatory context”. The Mary Wallopers denied the claim, asked for the festival to retract its “misleading” statement and shared footage of the moment on Instagram.