The lifers are Sohel, 32, son of AbdusS ukkur, Mohamamd Mohiuddin, 28, son of Azizul Haque and Foyez Ahmed, 30, son of Tofayel Ahmed of Hathazari upazila.
The court also fined them Tk 50,000 each.
According to the prosecution, the convicts entered the house of the victim at night and violated her in turns after keeping her only child hostage at gun point at Fatehpur in Hathazari upazila on May 17, 2017.
Victim’s husband filed a case against the convicts the following day.
Police submitted chargesheet against them on November 17, 2017. Among the convicts, Sohel gave confessional statement before the court under section 164.
After examining the records and six witnesses Chattogram Women and Child Repression Prevention Tribunal Judge Mohammad Motaher Ali handed down the verdict.