Three rescuers have died and six have been injured during efforts to reach a group of coal miners trapped underground in the US state of Utah.It is thought that the rescue workers were caught in a cave-in as they tried to dig a tunnel to the spot where it is believed the six miners are trapped.
The collapse happened at 1830 (0035 GMT), according to safety officials.
No contact has been made with the six trapped miners since a tunnel collapsed 1,500ft (457m) underground on 6 August.
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