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The agency said citing local authorities that the accident happened at 4.00 am local time at the Laojinchang gold mine in the town of Huadian.
A total of 51 miners were working underground when a fire broke out, resulting in a high density of carbon monoxide, according to the city’s publicity department.
Thirteen people escaped or were lifted out of the mine shortly after the accident, while another was pulled out later without injuries.
All the injured have been sent to nearby hospitals – though their condition has not been confirmed.
The mine, about 300 km from the provincial capital of Changchun has an annual capacity of 46,500 tonnes.
An investigation into the cause of the accident is under way.
Poor work safety standards have riddled China’s mining industry.
China is the world’s top gold producer.