The accused youths, who came across her way on Friday last, dragged her in a school building on the outskirts of the steel city and raped in turns, said Superintendent of Police (Rural) Shailendra Kumar Sinha.
The Police has arrested all accused after the girl lodged a FIR against the four in this regard on Saturday last, he said.
The accused identified as Bablu Tiu, Budheshwar Mahato, Kalu Mahato and Chotu Tiu also beat her up when she resisted their move, Sinha said.