Firefighters work after a train transporting gas derailed in the northeastern Bulgarian village of Hitrino on December 10, 2016. At least four people died and 23 were injured in a blast when a train transporting gas derailed in the northeastern Bulgarian village of Hitrino, emergency services said. Around 20 homes were smashed and many of the residents of the village of some 800 people were evacuated, Nikolay Nikolov, the head of fire safety and civil defence at the police said. / AFP / STR (Photo credit should read STR/AFP/Getty Images)
