Sandip Prasad (52), an electronics and communication department student of the 1986 batch, was keen to take up a teaching job at the IIT and had approached a friend who presently teaches at the premier institute.
Prasad's friend had made arrangements for his stay in the campus as a guest, following which he came down to the campus recently.
"For the past few days, he was depressed and rarely talked to anyone," a police official said.
His family members have been contacted in Ranchi but they are yet to reach the institute, the police official added.
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