Hyderabad: At least 20 students were killed and 10 injured when a school bus carrying them collided with a train at a railway crossing in Medak district of Telangana on Thursday, police said.

The accident occurred at Masyapet in Veldurti mandal of Medak district, about 70 km from here, when the bus of a private school was taking the students to the school located at Toopran.