SIOUX FALLS, S.D. (AP) — The Sioux Falls School District is apologizing for allowing a high school play performance that included student actors dressed in Ku Klux Klan clothing.District administrators say the production of “The Foreigner” at Roosevelt High School last weekend was not properly vetted. A local social advocacy group Establishing Sustainable Connections raised concerns about the racist attire. In a Facebook post, the organization said in today’s political climate, the imagery of KKK robes and hoods furthers the racial tension in the community.

District spokeswoman DeeAnn Konrad says the district violated its drama approval process on whether the costumes, themes, language and choreography are considered appropriate by community and state standards.

It’s not the first time the play has generated such a backlash. The production was canceled at New Prague High School in Minnesota two years ago.