URUMQI -- Three people were killed, one injured and seven more trapped after a coal mine collapsed Sunday afternoon in Northwest China's Xinjiang Uygur autonomous region, local authorities said Monday. A total of 19 people were working in the mine when part of the coal mine collapsed at around 2:50 pm in Shache county, the regional coal mine safety inspection authorities said. Eight people managed to escape. Bodies of the killed have been retrieved. Rescue work is underway, it added.