Sago Mine Explosion Cause

The owners of the Sago Mine say they believe lightning caused the explosion that killed 12 miners earlier this year.

The company's investigation of the accident found 3 pieces of compelling evidence that a massive lightning strike ignited methane gas in a sealed off area of the mine.

The company's chief executive told miners families weather monitors confirmed an unusually large and powerful lightning strike.

The West Virginia mine is resuming production today.