A coal miner died at Murray Energy Corp.'s Marshall County mine on Dec. 23 due to injuries sustained while helping to repair a beltline at the underground mine, according to a statement from the West Virginia governor's office.

The United Mine Workers of America said it is helping to investigate the death of the miner, 21-year-old Raymond Starkey. State and federal officials are also on the scene to investigate the incident.

"We will not rest until we know the circumstances of Brother Starkey's death, so that we can prevent something like this from ever happening again. I ask every mining family, indeed every American family, to lift up the Starkey family in your prayers this holiday season," United Mine Workers of America International President Cecil Roberts said in a statement.

Murray Energy confirmed a general inside laborer was fatally injured in a work accident at the mine. A company spokesman added that they were "saddened by the loss" and declined to provide further information or comment at this time "out of respect for his family."