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12 killed, 10 missing in US coal mine blast

 Authorities survey the scene of a mine explosion at the Upper Big Branch Mine, in Montcoal, W.Va., on Monday April 5, 2010.  (AP Photo/Jon C. Hancock...
 West Virginia State Police direct traffic at the entrance to Massey Energy's Upper Big Branch Coal Mine Monday, April 5, 2010 in Montcoal, W.Va.  (AP...
 View of the tipple near the scene of a mine explosion at the Upper Big Branch Mine in Montcoal, W.Va., on Monday April 5, 2010.  (AP Photo/Jon C. Han...
 Families and friends wait alongside emergency personnel after a mine explosion occured at the Upper Big Branch Mine, in Montcoal, W.Va., on Monday Ap...
 Emergency vehicles leave the entrance to Massey Energy's Upper Big Branch Coal Mine Monday, April 5, 2010 in Montcoal, W.Va.  (AP Photo/Jeff Gentner)...
 Billy Pettry, Caden Gray, 5, and Brandon Gray, from left, sit on the steps of the Marsh Fork Worship Center in Eunice, W.Va., near the entrance to Ma...
 Emergency vehicles leave the entrance to Massey Energy's Upper Big Branch Coal Mine Monday, April 5, 2010 in Montcoal, W.Va. after an explosion at th...
 View of the tipple near the scene of a mine explosion at the Upper Big Branch Mine in Montcoal, W.Va., on Monday April 5, 2010.  (AP Photo/Jon C. Han...
 Map locates where a mine explosion in West Virginia left multiple fatalities.

APTOPIX Mine Explosion

Authorities survey the scene of a mine explosion at the Upper Big Branch Mine, in Montcoal, W.Va., on Monday April 5, 2010. (AP Photo/Jon C. Hancock...

APTOPIX Mine Explosion

West Virginia State Police direct traffic at the entrance to Massey Energy's Upper Big Branch Coal Mine Monday, April 5, 2010 in Montcoal, W.Va. (AP...

Mine Explosion

View of the tipple near the scene of a mine explosion at the Upper Big Branch Mine in Montcoal, W.Va., on Monday April 5, 2010. (AP Photo/Jon C. Han...

Mine Explosion

Families and friends wait alongside emergency personnel after a mine explosion occured at the Upper Big Branch Mine, in Montcoal, W.Va., on Monday Ap...

Mine Explosion

Emergency vehicles leave the entrance to Massey Energy's Upper Big Branch Coal Mine Monday, April 5, 2010 in Montcoal, W.Va. (AP Photo/Jeff Gentner)...

Mine Explosion

Billy Pettry, Caden Gray, 5, and Brandon Gray, from left, sit on the steps of the Marsh Fork Worship Center in Eunice, W.Va., near the entrance to Ma...

Mine Explosion

Emergency vehicles leave the entrance to Massey Energy's Upper Big Branch Coal Mine Monday, April 5, 2010 in Montcoal, W.Va. after an explosion at th...

APTOPIX Mine Explosion

View of the tipple near the scene of a mine explosion at the Upper Big Branch Mine in Montcoal, W.Va., on Monday April 5, 2010. (AP Photo/Jon C. Han...

MINE_EXPLOSION

Map locates where a mine explosion in West Virginia left multiple fatalities.

A mine safety administrator says 12 workers are dead and 10 trapped deep underground after an explosion rocked a remote West Virginia coal mine.
The explosion happened Monday at Massey Energy Co.'s sprawling Upper Big Branch mine about 30 miles (50 kilometers) south of Charleston.
Rescuers are looking for 10 more trapped miners.
The cause of the blast was not known, however, the operation has a history of violations for not properly ventilating highly combustible methane gas, safety officials said.
Kevin Stricklin from the federal Mine Safety and Health Administration says miners were leaving on a vehicle that takes them in and out of the long shaft when the blast happened.
Stricklin says rescuers are getting closer to airtight chambers set up for miners to go to if they become trapped.