Nitin, 15-year-old Class 10 student, was allegedly shot dead by four classmates during a religious function in Meham town, 80 km from New Delhi, early Sunday, police said.
Police officials said the killing was the fallout of an old rivalry between two groups of young boys.
"Nitin tried to save his friend Ankur who was being assaulted by the other group outside the venue of a jagran (religious function). A scuffle ensued and one of the accused brought a home-made weapon and Nitin was shot," said a police official said.
The young boy was taken to a hospital but was declared dead by doctors.
Police arrested three of the four accused later on Sunday.
Family members and supporters of the killed boy staged angry protests outside the Meham police station and even blocked a road for some time.