The 16-year-old victim had gone to attend the nature's call last night when Jogi Chamar (18), Sarvjit Chamar (17) and Chandra Srivastava (18) gang-raped her last night, SP Ashok Kumar Shukla said.
When the girl reached home and narrated the incident, her father Ashok Gautam lodged an FIR against the accused, who were arrested this afternoon.
Further probes are on, the SP added.