Sub-Divisional Magistrate (SDM) Sanjay Kumar Nirala said a flock of sheep was grazing near the Madhepura railway station when over 200 of them wandered on the track and got fatally run over by Saharsa-bound Janaki Express.
The railway authorities have been informed about the incident.
The shepherds who had brought the flock of sheep for grazing fled after the incident, Nirala said.