File photo released by the government of Urumqi City in a press conference in Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, on July 7, 2009, shows vehicles burnt in the riot. [Xinhua] 

File photo released by the government of Urumqi City in a press conference in Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, on July 7, 2009, shows a medical worker taking care of a man injured in the riot. [Xinhua]