Chinese police say two knife-wielding men attacked a crowd in China's far northwestern Xinjiang border region Saturday night, killing at least six people and wounding 28 others.

Authorities say the attack began with two explosions in the Silk Road city of Kashgar. Two men then killed a truck driver at an intersection and hijacked his truck. They then drove the truck into a crowd, got out, and attacked pedestrians with knives, killing six of them.

Police said the crowd beat one attacker to death and captured the second.

The motive for the attack is not clear.

In a deadly incident earlier this months, police shot 14 rioters who attacked a police station and killed four people in Xinjiang's Hotan city on July 18.

The Xinjiang region is home to millions of Muslim Uighurs, who are angry with what they say has been decades of repressive rule by Beijing and the unwanted immigration of China's dominant Han ethnic group.