The teenager was reportedly waiting to be questioned in the police station when the incident took place. He has been admitted to a private hospital where he has had a surgery on his neck.
The police claim it was an accidental shooting. The boy was injured when a loaded revolver, which an inspector was cleaning, went off, said police sources.
"We have ordered an inquiry by the Revenue Divisional Officer as the case is against the police," Regional Division Officer said.
The boy's family suspects the police are lying. Child rights activist say the police violated the Juvenile Justice Act, which says minors cannot be brought to the police station for questioning, no matter what their crime is.
The boy was threatened by the police, claims the family of the minor.