The incident took place yesterday when the girl had gone to collect mangoes from an orchard, following which the accused allegedly raped her, Sunil Singh, In-charge Superintendent of Police said.
Later, the girl's body was recovered from a cane field, he said.
DIG Devipatan division Vijay Garh and district magistrate Narendra Kumar Singh visited the spot yesterday.
On the complaint given by the girl's father, a case of rape and murder has been lodged, the SP said.
He said that the post-mortem has been conducted by a panel of three doctors.
