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Emergency Response to Bulgaria Train Explosion

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Emergency Response to Bulgaria Train Explosion

In this aerial view emergency services attend the scene of devastation after a tanker train derailed and a gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said at least five people were killed and many injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petar Petrov / Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

In this aerial view emergency services attend the scene of devastation after a tanker train derailed and a gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said at least five people were killed and many injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petar Petrov / Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

Firefighters work at the scene after a tanker train derailed and gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said the explosion caused deaths and many more injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petko Momchilov/Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

Firefighters work at the scene after a tanker train derailed and gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said the explosion caused deaths and many more injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petko Momchilov/Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

Firefighters work at the scene after a tanker train derailed and gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said the explosion caused deaths and many more injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petko Momchilov/Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

Firefighters work at the scene after a tanker train derailed and gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said the explosion caused deaths and many more injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petko Momchilov/Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

Firefighters work to extinguish a tanker at the scene after a tanker train derailed and gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said the explosion caused deaths and many more injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petko Momchilov/Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

Firefighters work at the scene after a tanker train derailed and gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said the explosion caused deaths and many more injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petko Momchilov/Sky Pictures Bulgaria via AP)

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Emergency Response to Bulgaria Train Explosion

In this photo released by Bulgarian Interior Ministry, firefighters work at the scene of a train derailment following an explosion in the village of Hitrino in Bulgaria Saturday, Dec 10, 2016. Firefighters in Bulgaria said on Saturday that several people were killed when a train derailed and containers of gas exploded. (Bulgarian Interior Ministry via AP)

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Emergency Response to Bulgaria Train Explosion

In this aerial view emergency services attend the scene of devastation after a tanker train derailed and a gas tank exploded in the village of Hitrino, northeastern Bulgaria, early Saturday, Dec. 10, 2016. Firefighters said at least five people were killed and many injured when a train derailed and containers of liquefied petroleum gas exploded, destroying at least 20 buildings in the village. (Petar Petrov / Sky Pictures Bulgaria via AP)