DICKINSON, N.D. (AP) — Metal band Great White has apologized for performing at an outdoor North Dakota concert where the crowd didn’t wear masks despite the ongoing threat of the coronavirus.

The band drew criticism on social media after the performance Thursday night as part of the “First on First: Dickinson Summer Nights” concert series in Dickinson, in the southwest of the state. Spin magazine posted video showing the crowd packed in and not wearing face masks.

“We have had the luxury of hindsight and we would like to apologize to those who disagreed with our decision to fulfill our contractual agreement. The Promoter and staff were nothing but professional and assured us of the safety precautions,” Great White said in a statement Saturday.

Although North Dakota health officials recommend social distancing and wearing masks when possible, there is no legal requirement to do so in the state and Great White said the band nevertheless was “not in a position to enforce the laws.”