A woman and her son were hacked to death over sex business at Deolia village in Bagmara upazila yesterday.
The deceased were identified as Akhlima Begum, 45, wife of former UP member late Mojibur, and their son Jahidur Rahmna Jahid, 25, a college student.
Sources said local people found the lying bodies in their house in the morning and informed police.
Police said, they might have been killed by stabbing at first and later they were hacked.
The sources said Akhlima used to run sex-business in a rented house and several times she was arrested for this.
Shahina, the daughter of the deceased also said her mother might have been killed over the business.
Alamgir Kabir, superintendent of police said Akhlima used to run the business in the area. Earlier, a mobile court also sent her to jail for two months for running the business in the locality.