MOSCOW (AP) — A spokeswoman for the Bolshoi Theater says police has detained a suspect in the January acid attack on its artistic director.

Moscow police said in a statement on Tuesday that it was questioning a suspect in the attack but did not provide any other details. Calls to a police spokesperson went unanswered. Katerina Novikova, a theater spokeswoman, said the suspect was detained Tuesday.

The theater's artistic director, Sergei Filin, was left with severe burns to his eyes and face when an unidentified attacker threw sulfuric acid in his face on Jan. 17 as he was returning home from work. He's now undergoing treatment in Germany.

Filin's colleagues have said the attack on Filin could be in retaliation for his selection of certain dancers over others for the prized roles.