An FIR has been filed against two senior students -- Karan and Vijay -- as well as other unidentified students after a complaint was filed by the brother of the deceased, Mishra said.
According to preliminary investigation, the seniors ragged the victim on September 1, police said, adding, depressed over the incident, Vishwakarma took the extreme step.
Members of the 'anti-ragging unit' of the college as well as the college authorities are being questioned in the matter, they said.
Meanwhile, principal F R Khan has set up a committee of 7 teachers to probe the incident.
The college is also keeping a watchful eye on the freshers to prevent any untoward incident, police said.
No arrests have been made so far, they said, adding investigation is on to nab the accused.