The deceased identified as J R Philemon, native of Senapti district in Manipur, was found dead in room no 171 of the Brahmaputra Hostel, police said.
He was pursing his PhD on the subject of West Asia and he hadn't been seen for the last three days, a senior police officer said.
"When a foul smell started emanating from the room, the student in the neighbouring room called other students and security and forcefully opened door. He was found dead in the room," he said. Further investigation is underway to ascertain the cause of death.