Students of Balaji High School at Kanisi under Golanthara police station limits on the outskirts of the city were shocked on Friday morning when they located body of their night watchman Bikash Chandra Mohapatra (40) hanging from the fan in the room of the headmaster. Receiving information police reached the spot and seized body. According to police sources the night watchman who was on duty all alone in the school building had committed suicide by hanging himself.