Doctors in Nis said two 16-year-olds have life-threatening injuries. Relatives have gathered at the hospital awaiting information.
Serbian state TV says that the bus was carrying local children to school. A video from the scene shows that the bus was practically cut in half by the impact, while the train partly slid off the tracks.
“When I heard a big bang I knew it was bad,” said a witness, Stevan Jocic. “The bus was cut down the middle, passengers inside, all high school kids. It was horrific.”