According to the girl, two youths stopped her cycle, grabbed her and took her to an under-construction building, a police officer said, adding, three other persons were waiting there and she was gang-raped.
A local resident went to the spot after he heard the girl crying, the officer said.
The accused fled the scene as soon as the man reached the spot, the officer added.
The man took the girl to his house and informed her parents, and the girl's father lodged a complaint with the Jalpaiguri Women Police Station on Wednesday, the police officer said.
"We have arrested two accused. We hope to arrest the other three soon," the Officer-in-Charge of the police station, Upasana Gurung, said.
The accused would be produced before a court Thursday, Gurung said.
The woman was sent to Jalpaiguri Sadar Hospital for medical examination, a police officer said.