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The accident took place on Saturday in Chongqing municipality when the connecting segment of a mining skip broke, causing it to slide down the inclined shaft, state-run Xinhua news agency reported.
Seven miners working in the shaft were killed. The three injured miners have been rushed to a hospital, the report said. Accidents in coal mines are common in China.However, the number of deaths have reduced at mines in recent years.
In October, 8 miners were killed after a rock burst ripped through a coal mine in Yuncheng county of Shangdong province.
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Similarly in May, a methane gas explosion ripped through a coal mine in central China’s Hunan province, killing at least five workers.