The prime accused - Riaj Khan, 25, son of Hafizur Rahman of Deyapara in the upazila – is a brother-in-law of the victim’s elder sister.
Her mother alleged that Riaj and his friends had long been stalking her daughter. When the girl protested, they threatened to kill her and set fire to her house.
Taking the advantage of empty house on Friday afternoon as the mother went to a relative’s house, the trio raped her in turns and left her in front of the house.
As she fell sick, she was first taken to the Abhaynagar Upazila Health Complex and later sent to Khulna Medical College Hospital for better treatment, the mother said.
Tajul Islam, officer-in-charge of Abhaynagar Police Station, said a case was filed over the incident. “We’re trying to arrest the accused,” he said.