Havildar Erappa Hurli hailing from Karnataka was found hanging from the ceiling fan.
He was posted at Jai Paltan Line of the Indian Army, Aravali Vihar police station said.
His body has been kept at Military Hospital and family members have been informed about the incident, police said.
Aravali Vihar police have registered a case under CrPC 174 and further investigation is on.
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