Four speleologists from Belgrade died yesterday during research at a cave in central Serbia, Beta news agency reported.
Rescuers who pulled out the bodies said the cause of the death most likely was carbon monoxide released by a pump extracting water from a lake in the Ravanica cave, about 140 kilometres south of Belgrade.
Four speleologists from Belgrade died yesterday during research at a cave in central Serbia, Beta news agency reported.
Rescuers who pulled out the bodies said the cause of the death most likely was carbon monoxide released by a pump extracting water from a lake in the Ravanica cave, about 140 kilometres south of Belgrade.