Police officers stand guard near a blast scene, which has been cordoned off, in downtown Urumqi, capital of northwest China's Xinjiang Uygur Autonomous Region, May 22, 2014. Thirty-one people were killed and 94 injured after explosions occurred Thursday morning at an open market in Urumqi. Witnesses said two cross-country vehicles driving from north to south ploughed into people in the market at 7:50 a.m. Explosives were thrown out of the vehicles. One of the vehicles exploded in the market. All injured people have been sent to hospital while investigations are underway. [Xinhua]