DENVER (AP) — Federal investigators say two Colorado miners who died of carbon monoxide poisoning apparently entered an area of the mine where an explosive had been previously detonated.
The miners died Sunday morning at the mine near Ouray (yoo-RAY').
Amy Louviere, a spokeswoman for the Mine Safety and Health Administration, said Monday that preliminary information indicates one of the miners entered the area first.
She says when he didn't return, a foreman went looking for him. They were both found later by other miners.
Mine manager Rory Williams previously said there was a blast in the mine on Saturday to remove rock, and the explosion might have been a source of the carbon monoxide.
Nineteen miners were also taken to the hospital for treatment, and all have been released.