SHIJIAZHUANG - Six mine workers were trapped after a coal mine collapsed early Wednesday in North China's Hebei province, the mining company said.

The cave-in happened at 4:37 am in the Qianjiaying mining subsidiary of Kailuan (Group) Limited Liability Corporation, a major state-owned coal mining company in Hebei, the group said in a statement on its official WeChat account.

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The Qianjiaying subsidiary is located in Fengnan district in the city of Tangshan.

Rescuers are racing against the time to reach the trapped miners.