The deceased identified as Vishnu Chaudhary was posted in the vigilance unit of the Jaipur municipal corporation, the police said on Thursday.
The incident came to light on Thursday afternoon when another constable reached his quarter and saw him hanging from the fan, the Station House Officer of Jalupura police station, Likhma Ram, said.
Vishnu Chaudhary was alone in the quarter when he took the extreme step, the police said, adding no suicide note was recovered from there.
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