According to police, the boy is alleged to have yesterday lured the girl to a house in the slum area where he raped her and then left her bleeding.
The victim's grandmother filed an FIR yesterday against the accused boy at Malviya Nagar police station following which he was detained under various sections of POCSO Act and sent to 'Balsudhar Grah' upon a juvenile court's order, police added.
The girl was taken to a government hospital for treatment and medical examination, police said.