Facts about the mine explosion in Kentucky:
— Holmes Mill, Ky.
— Three of the five coal miners killed in an explosion died of carbon monoxide poisoning.
— Two miners died from multiple blunt force trauma and heat injuries.
— According to Harlan County coroner.
— Kentucky lawmakers passed a measure requiring mines to store breathing devices underground, and to set up lifelines to help miners find their way out.
— That law doesn't take effect until July.
— Saturday's explosion was the deadliest mining accident in the state since 1989, when 10 miners died in a western Kentucky mine blast.
— Death toll from coal mining accidents is now 31 this year, with 10 of them in Kentucky.