Sixteen people were killed and 11 others injured after a coal mine collapsed in China's Xinjiang Uygur Autonomous Region, local safety watchdog said Saturday. The accident happened in the regional capital Urumqi late Friday night when 33 workers were working underground. Six of them managed to escape, Xinhua quoted Xinjiang Administration of Coal Mine Safety as saying. The injured workers have been hospitalized. The cause of the accident is being investigated in an orderly manner, the safety watchdog said.