Denis Ten, an Olympic bronze medalist in men’s figure skating in 2014, died on Thursday at age 25 after being stabbed in Almaty, Kazakhstan.

Ten was taken to the hospital after the attack and died a few hours later. Russian and Kazakh news media reported that two men had been trying to steal mirrors from Ten’s car. Ten lost a significant amount of blood, and doctors said CPR was administered for two hours, but in vain.

“Denis Ten caught two unidentified persons trying to steal mirrors from his car,” the Almaty Department of Internal Affairs said. “As a result of a brawl, citizen Denis Ten was stabbed. An investigation has been initiated; measures are being taken to identify and detain suspects.”

Born in Almaty, Ten was part of Kazakhstan’s Korean minority. He moved to Moscow to train at a higher level at age 10, then to Southern California to work with the top American coach Frank Carroll.