Among those held is a minor who has been sent to a juvenile home, while the others were remanded to jail, he added.
Those arrested are Shankar Tiu, Roshan Kujur, Suraj Patro and Sunny Soren, the officer said.
A country-made pistol and two live cartridges were also recovered from them, he said.
“Soon after the incident, the police registered a case and started investigating it. The girl had initially said that she was abducted while she was returning from dance class. However, it was found wrong during the investigation,” Vanan said.