In her complaint, the woman told police that the prime accused, who befriended her around six months ago, allegedly raped her over a period of time on pretext of marriage, a police official said.
She approached the police earlier this week after her friend, who has a mobile repair shop, lured her to his room where he, along with three others, allegedly raped her.
A case under IPC Section 376 D (gang-rape) has been registered and police are looking out for the accused who are absconding, a senior official said.