The incident occurred yesterday when the victims were playing cricket at Khamaria primary school ground, they said.
Firoz (22), Rohit (19) and Siddhu (20) died on the spot while three sustained injuries, police said.
Among the injured, the condition of Jumman (20) is stated to be serious and has been referred to Lucknow, they said.
The district administration has announced a financial assistance of rupees four lakh each to the families of the deceased.