Here are reactions released by elected officials and coal industry executives on Tuesday to the Massey Energy underground Upper Big Branch coal mine explosion in Raleigh County.
As of Tuesday night, 25 miners were confirmed dead and four remained unaccounted for.
"Clearly, we must get to the bottom of what happened, how and who was responsible. And we must and will hold those parties accountable. At least 25 coal miners have died inside a mine that has over time amassed scores of safety violations, including 57 citations just last month. West Virginia's coal miners are the backbone of this great nation that depends on their work. They deserve nothing less than a safe working environment, and an employer who respects and values their safety."
Sen. Robert C. Byrd, D-W.Va.
"For the families and friends of those still missing and for those who have not heard any news at all, I wish so much I could ease your pain and I pray for their safety and hope for a miracle ... I will demand answers. We will leave no stone unturned in determining how this happened and in taking action for the future. ...
We in West Virginia revere our coal miners. We know their unique sacrifice, and we are forever in their debt."
Sen. Jay Rockefeller, D-W.Va.
"I want to know why this tragedy happened; there will be a thorough investigation. We will seek answers about the cause of this disaster. We will look for inadequacies in the law and enforcement practices, and I will work to fix any we have.
We will scrutinize the health and safety violations at this mine to see whether the law is circumvented and miners' precious lives were willfully put at risk and there will be accountability."
Rep. Nick Rahall, D-W.Va.