Director Zhenya Berkovich, 39, and playwright Svetlana Petriychuk, 44, were arrested in May last year over their production of a play called "Finist, the Brave Falcon," about Russian women who marry Islamic State fighters.

The case was the most prominent prosecution of Russian cultural figures over the content of their artwork since Moscow sent troops into Ukraine in 2022. Both denied guilt.

The seven-week trial was condemned by free speech campaigners and Russia s artistic community as politically motivated.

Partway through the trial, judge Yuri Massin approved a request from prosecutors to close the proceedings to the public over alleged threats to some participants.

At the start of their trial in late May, Berkovich and Petriychuk said they had staged the play because they oppose terrorism rather than support it.

"I staged the performance to prevent terrorism," Berkovich, told the court. Towards terrorists, she said, "I have nothing but condemnation and disgust."