A fight broke out after students at a language school held a belated St Patrick's Day flashmob in a mall in Irkutsk, a police spokesperson said.
"On Sunday evening, members of Easy School held a St Patrick's Day flashmob in the mall. Some youths came up to them and expressed displeasure at the proceedings. A conflict took place that grew into a fight on the square outside the mall," the spokesman said.
A law enforcement source told Interfax that the fight was based on a misunderstanding. "The Easy School members were wearing historic costumes, particularly kilts and their opponents mistook them for representatives of non-traditional sexual orientation," the source said, using a Russian phrase meaning gay.
The school posted a video of the flash mob on the social networking site VKontakte showing many wearing checked kilts and confirmed its students and teachers were hurt in the fight.
A teacher reportedly suffered a mild concussion in the attack. Watch the video footage, after the jump. (Warning: violence.)