The victim, a class 11 student at a government school, was found lying in a pool of blood.
The boy's parents say that he had been reluctant to go to school ever since he recently had a fight with his classmates, who they allege beat their son to death.
"I came to the school at around 6 pm and found his body," the teen's father said, and added, "the police is being very insensitive and not listening to us."
Police say the possibility of the boy having committed suicide by jumping from the school building is being probed and his post-mortem report is awaited.
Meanwhile, the principal of the school has been suspended for alleged negligence.