New Delhi, June 6 -- I saw him in the mess that night, and he seemed absolutely fine. The next time I saw him, he was dead. His body had turned bluish and there was vomit on the floor. It didn't look like a suicide," said one of hostel mates of Ayush Singhal, a student who was found dead in his Indian Institute of Technology (IIT) Delhi hostel room on Wednesday.

Ayush, 25, was a second-year PhD scholar at the Indian Institute of Technology (IIT) Delhi, enrolled in the Biomedical Engineering programme. According to police, he had not been seen or heard from since Monday night. Institute officials confirmed that he was a resident of Dronagiri hostel and originally from Chandigarh. A staff member of the Biomedical Engineering department at II...