One of the owners of a Utah mine where six miners are trapped says it will take at least three days to reach the miners.
There's been no word from them since they became trapped more than 1,500 feet below the surface yesterday.
Crews worked through the night in shifts, with teams coming and going.
The chairman of the Murray Energy Corporation, one of the owners of the mine, says, "Progress has been too slow."
Even after crews are able to drill through to the miners, he says rescuers will have just a two-inch hole through which to communicate with them and provide them with supplies.
Robert Murray also continues to insist that the collapse that trapped the miners was caused by an earthquake.