One more body was retrieved Wednesday after a coal and gas outburst hit a coal mine in southwest China\'s Guizhou Province, bringing the death toll of the accident to 17, the official Xinhua News Agency reported.The agency added thart 11 others were saved and under medical treatment, but it is not known yet if they are in critical condition. 28 miners were working in the shaft when the accident happened on Tuesday, it said. 13 managed to escape, and among them, three died later in hospital. An investigation into the cause of the accident is under way.Although work safety situations in China have improved, mine disasters continue to kill many workers each year.Last year, 2,433 people were killed, according to China\'s State Administration of Coal Mine Safety. This means accidents killed six coal miners per day.