A 15-year old class IX girl was allegedly gang-raped at Uttarpara in Hooghly district, police said on Saturday.
Three of the accused were arrested in connection with the Friday night's gang-rape of the girl and police were trying to find out if anybody else was involved in the case, they said.
The girl's family had lodged an FIR against the three youths, all residents of her locality, following which they were arrested.
The accused, all in their twenties, had allegedly took the class IX student to a deserted house beside a car factory and raped her.
The victim was undergoing treatment at a local hospital, he added.
On March 14, a 71-year-old nun of a convent school in Nadia district of the state was allegedly gangraped by some dacoits after which a CID probe was ordered.