The incident took place last night at Manhi village when the girl went out of her house and the three men overpowered her, Ghordiha police station in-cahrge Neeraj Kumar said.
The victim's mother lodged a complaint with the police after the girl told her about the incident, and raids were on to nab the three accused, identified as the residents of neighbouring Supaul district.
The girl, meanwhile, has been taken to a government hospital for medical examination, the police officer said.