ST. LOUIS (AP) -- An investigation into an underground mine fire that trapped three miners last week in southeast Missouri is being investigated by federal mine safety officials.
The U.S. Department of Labor's Mine Safety and Health Administration said Monday it had launched a full investigation.
But the department's assistant secretary for mine safety and health said the good outcome reaffirms the value of having an emergency response plan, mine rescue teams, and refuge chambers for trapped miners awaiting help.
A truck fire broke out Thursday at a Doe Run lead zinc mine in Bunker, Mo., trapping three miners, who traveled to a rescue chamber, and waited until a Doe Run team extracted them. The miners were treated and released.
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