A performance of a play about the embattled Russian protest group Pussy Riot was interrupted in Moscow when immigration officials approached the Swiss director to ask for his travel documents.

Immigration authorities confirmed they had entered the Sakharov human rights museum, where the play was being staged, and determined that director Milo Rau was holding a business visa that did not allow for “work activity.”

The play was later disrupted a second time when Orthodox activists and Cossacks gathered outside the venue to protest what they claimed was the play’s antireligious content.

The play, called “The Moscow Trials,” tells the story of last year’s trial of three Pussy Riot members for hooliganism after staging a protest against Vladimir Putin in Moscow’s Christ the Savior Cathedral.

Based on reporting by AFP and Interfax