Europe

4 killed in Bulgarian explosion following train derailment

  • In this photo released by Bulgarian Interior Ministry, a municipality building is seen after an explosion following a train derailment 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)

    In this photo released by Bulgarian Interior Ministry, a municipality building is seen after an explosion following a train derailment 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)  (The Associated Press)

  • In this photo released by Bulgarian Interior Ministry, burned containers are seen derailed after an explosion upon derailment 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)

    In this photo released by Bulgarian Interior Ministry, burned containers are seen derailed after an explosion upon derailment 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)  (The Associated Press)

  • 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)

    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)  (The Associated Press)

Firefighters in Bulgaria say at least four people were killed and 23 injured when a train derailed and containers of gas exploded.

Nikolay Nikolov, who heads the country's firefighting department, said at least 20 buildings in the village of Hitrino in northeastern Bulgaria were destroyed in the blast early Saturday as containers carrying liquefied petroleum gas exploded.

Nikolov says the immediate surroundings of the site have been evacuated, and that the cause of the disaster was unclear.