UPDATE @ 12AM TUESDAY:
HUNTINGTON, Utah (AP) - There has been a setback in the effort to free six trapped miners from a Utah coal mine.
Rescuers have been slowed by falling rock and debris.
Workers have been unable to make significant progress, and the initial effort is being declared a failure.
A part owner of the Crandall Canyon mine says he's very disappointed.
Searchers have been unable to contact the miners. It's not clear if the six are dead or alive.
If they survived the collapse, a company official says there should be enough air and water to last several days.
Rescuers plan to spend the night bulldozing a road outside the mine to make way for a drilling rig that can punch holes large enough to improve ventilation and determine whether the men are alive.
They also plan to continue drilling from inside and outside the mine.
Robert Murray, the chairman of Murray Energy, a part owner of the Crandall Canyon mine. He says he is staying hopeful. "We're going to get them," Murray said.
The chairman of Murray Energy Corporation, who is at the scene, says the miners are about 1,500 feet below ground and rescuers were within 1,700 feet of the men.
The mine is large enough to accommodate trucks, but Robert Murray says crews don't know how much rubble is in the way. There has also been no contact with the miners.
University of Utah seismograph stations recorded seismic waves of 3.9 magnitude in the area of the mine this morning, causing speculation that a minor earthquake had caused the cave-in. Scientists later realized the collapse at the mine had caused the disturbance.