Two dozen workers were trapped in a flooded mine in northeast China on 31 July, the latest accident to hit the country's coal industry.
Water gushed into the Hengxinyuan coal mine, located in the Hengshan District of Jixi City, which is in northeast China's Heilongjiang province.
A team from the State Work Safety Administration is investigating the mine disaster, reports AP.
News of the trapped workers came one day after a blast at a workers' dormitory killed at least 17 people.
The blast left a crater 65ft wide and 16 ft deep, according to the official Xinhua News Agency.
Coal mine accidents have killed 351 people this year, according to the website of the Work Safety Administration.