Star dancer Pavel Dmitrichenko, 29, confessed to masterminding the attack, and two other men confessed to being accomplices, police said in a statement.
“I organized that attack but not to the extent that it occurred,” a bleary-eyed Dmitrichenko said in footage released by Russian police.
Moscow police said in a statement that investigators believe that Dmitrichenko harbored “personal enmity” against Filin.
Investigators got suspicious of Dmitrichenko when they found out he had recently been in close contact with an unemployed convict. The suspects were making inquiries about Filin's schedule and whereabouts and bought SIM cards for mobile phones registered under fake names, police said.
Police found out that the acid that the alleged attacker, 35-year-old Yuri Zarutsky, splashed on Filin's face was bought at an auto shop. Police said Zarutsky is believed to have heated it to make the water evaporate to make the acid stronger. On the night of the attack Dmitrichenko tipped off Zarutsky when Filin left the theater, police said.
Bolshoi spokeswoman Katerina Novikova told the AP that Filin had been informed about Dmitrichenko's detention, but said the theater would not comment until after the trial.
Dmitrichenko, who comes from a family of dancers and joined the Bolshoi in 2002, has danced several major parts in recent years, including the villain in “Swan Lake.” Novikova said Tuesday that management was unaware of any conflict between him and Filin. However, Channel One state television reported that Dmitrichenko's girlfriend, Anzhelina Vorontsova, also a Bolshoi soloist, was known to have been at odds with Filin.
Dmitrichenko remained in police custody pending a court hearing Thursday in which prosecutors will ask the court to have the men arrested. It was unclear whether the three men had lawyers, or when the prosecutors will move for formal charges against them.
The Bolshoi Theater is one of Russia's premier cultural institutions, best known for “Swan Lake” and other grand classical ballets. Backstage, the ballet company has been troubled by deep intrigue and infighting that have led to the departure of several artistic directors over recent years.
Zarutsky was detained on Tuesday in the Tver region north of Moscow, police said. Police had also detained and questioned another suspected accomplice, identified as Andrei Lipatov, who is believed to have driven Zarutsky to the scene of the crime.