The body of Tushar Yadav (19), a resident of Gurgaon in Haryana, was found lying in a pool of blood around 7:30 am.
The police maintain that the student committed suicide on Saturday night by jumping from the hostel rooftop.
“In the suicide note, the student has apologised to his parents,” police said. They are waiting for the fingerprints report.
The post-mortem was conducted at Gauhati Medical College and Hospital. Students and faculty of IIT Guwahati, which is on the outskirts of the city, were shocked.
His friends said he has been suffering from depression since long, but they were not aware of the reasons, though Yadav was good at studies.
This is the second suicide case in IIT Guwahati in the last six months. Shoaib Ahmed, a second semester M.Sc. student from West Bengal, hanged himself from the ceiling fan of his hostel room in March.
At least five suicide cases have been reported in the institution so far.
IIT Guwahati is in the top 100 young world universities' list published by London-based Times Higher Education magazine, becoming the first Indian institute to receive the accolade. The institute was established on the basis of the Assam Accord.