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The bodies of the workers were lifted out of the well that flooded the Dahongcai iron mine in Daixian County on June 10.
A rescue team comprising 1,084 people worked for six straight days. The DNA confirmation has been completed, according to the local rescue headquarters.
Police have detained 13 suspects. An investigation into the cause of the accident is underway, the state-run Xinhua news agency reported on late Wednesday night.
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Most accidents are blamed on a failure to follow safety regulations, including adequate ventilation and available fire control equipment.
In November last year, the Chinese government launched a year-long review of all functioning coal mines and coal-mining projects, highlighting issues of infrastructure, risk prevention management and capabilities for emergency response and rescue.