China's official state-run Xinhua news agency said details regarding the executions of Abdurahman Azat, 34, and Kurbanjan Hemit, 29, were sparse given the pair were executed out of public sight.
Authorities accused the pair of orchestrating the deadly Aug. 4 attack in the town of Kashi in an attempt to disrupt the Beijing Olympic Games. The Olympic Games began four days later.
Azat was accused of driving a truck into a group of more than 70 police officers during the attack, while Hemit used explosives and a knife to attack police.
The attack left 17 police officers dead and another 15 injured, Xinhua said.
CNN said the pair was convicted of homicide and illegally producing guns, ammunition and explosives, leading to a death sentence handed down on Dec. 17.