The 23-year-old accused, who is known to the girl, on Saturday took the Class VIII student from her school in Kothapalli village to a fort on the outskirts of Karimnagar town where he allegedly raped her, sub-inspector A Naresh Reddy said.
The accused then left the girl at her school, he said, adding the survivor belongs to a scheduled caste.
Later, the girl reached home and informed her parents about the incident who then approached police.
Subsequently, the police yesterday registered a case against the man under Indian Penal Code section 376, for offence of rape, he said.
He was also booked under relevant provisions of the Protection of Children from Sexual Offences (POCSO) Act and the SC/ST (Prevention of Atrocities) Act, Reddy said.
Efforts are on to trace the accused, he added.