Two workers were killed in separate accidents at underground coal mines in West Virginia on Friday, bringing the state's mining death toll for the year to 18.

A miner was apparently caught and pulled into a conveyor system at a Mystic Energy mine near Wharton, said Amy Louviere, a spokeswoman for the federal Mine Safety and Health Administration.

At a Jacob Mining Co. mine near Naugutack, rock and roof support material fell on a 15-ton locomotive, killing the operator, Louviere said.

Twelve miners died after an explosion Jan. 2 at the Sago Mine.