Two lighting technicians from the Bolshoi Ballet were jailed for more than three years yesterday for beating a prostitute, tying her up and stealing from her after she had had sex with both of them. Mark Statsev, 26, and Yury Kovrigin, 30 - described by the famed ballet company as 'non-aggressive' - admitted robbing Yu Yuk-kam, 45, in their room at the Marco Polo Hotel last September 19 after a day of drinking. Saying Ms Yu had been 'viciously attacked' by the pair, who used 'an unacceptable level of violence', Deputy District Judge Anthony Kwok Kai-on jailed them for 40 months. The District Court heard that after beating the prostitute and tying her hands and feet with towels, they took US$1,014, HK$500 and other items, including a Maxim's cake coupon, from her bag. The attack, which left Ms Yu in hospital for almost two weeks, began after Statsev felt dissatisfied with her services, the court was told. Statsev and Kovrigin arrived in Hong Kong on September 13 for a performance of Spartacus at the Cultural Centre. They met Ms Yu outside the Marco Polo on the night of September 18, a day after the performance. The three went to Statsev's room, where Ms Yu gave Statsev a massage and had sex with both men. Kovrigin paid HK$250 and US$200 respectively for the services. While Ms Yu was providing another service for Kovrigin, Statsev suddenly wrapped a towel around her neck from behind. Kovrigin sat on her legs and both men hit her on the head, face and other parts of her body for two to three minutes until she collapsed. When she came to, she saw Statsev take money from her bag. After they left, Ms Yu called room service. A police officer found her with hands and feet bound and bleeding from her eyes, nose and mouth. Statsev and Kovrigin were arrested. Lawyer James Niehoster said Statsev was intoxicated and felt dissatisfied with Ms Yu's services. There was much confusion as Statsev spoke no English and Ms Yu very little, he said. Michael Arther, for Kovrigin, said both men were intoxicated. Because of the incident, both will lose jobs with the ballet troupe. Both lawyers said in mitigation that the two had pleaded guilty before trial. In letters to the court, the Bolshoi described Statsev as 'modest, reserved and non-aggressive' and Kovrigin as a 'quiet, unaggressive person'.