Kenyan police have launched an investigation into the death of Ugandan athlete Benjamin Kiplagat, who was found dead with stab wounds in a car Sunday on the outskirts of the Kenyan town of Eldoret.

“This was murder, but we do not know the motive for now,” Stephen Okal, a local police commander, told the Associated Press.

Kiplagat, a long-distance runner who specialized in the 3,000-meter steeplechase, represented Uganda in the 2008, 2012, and 2016 Summer Olympics.

Eldoret is a well-known high altitude training center for athletes.

Some material in this report came from The Associated Press and Agence France-Presse.