Facts about the mine explosion in Kentucky:

Where

— Holmes Mill, Ky.

Findings

— 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.

Legislation

— 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.

Incident

— Saturday's explosion was the deadliest mining accident in the state since 1989, when 10 miners died in a western Kentucky mine blast.

Nationwide

— Death toll from coal mining accidents is now 31 this year, with 10 of them in Kentucky.