In a shocking incident, some first year engineering students were allegedly beaten up and paraded naked by their seniors in the presence of girls in a private university campus in Dehra Dun, the police said Wednesday.

Five students, who were injured in the incident Tuesday, have been hospitalised, they said.

Senior police officials said the matter was being investigated even as staff of the University of Petroleum and Energy Studies were not available for comments.

A group of nearly 25 senior students barged into the class room of first year students of the university Tuesday and after bolting the room from inside, asked the juniors to strip in the presence of girls students whom they forced to remain seated, the police said.

When the juniors resisted, the seniors started beating them up and threatened them of dire consequences if they did not oblige. However, none of the seniors involved in the ragging have been arrested as yet.