Huntington, Utah (AP) Rescuers are trying to determine what triggered noise readings coming from the Crandall Canyon coal mine.
Devices that monitor vibrations in the mountain picked up some noises that rescuers haven't heard before during the search for six men who are missing in the mine.
The head of the Mine Health and Safety Administration says the sounds could be rock breaking underground or even an animal.
But it was still some hopeful news. The location of a fourth borehole was moved because of the noise readings.
The mine's co-owner also says that video taken from a hole that broke through yesterday shows an intact chamber and a ventilation curtain. He says that means that the men could have breathable air if they survived the collapse.
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