Students at the National Institute of Technology at Silchar in Cachar district of Assam on Friday night clashed with the police during an aggressive protest after the death of one of their fellow students at the college hostel. A student from Arunachal Pradesh, who was in the third semester of the electric engineering course, allegedly hung himself after he failed exams and couldn't clear his back papers, sources said. He had requested the college authorities to allow him to register for the next semester, but it was reportedly turned down, they said.