Police recovered bodies of a woman and her two daughters from their house in Lama Municipality area of Bandarband on Friday evening.
The deceased were identified as Majeda Begum, 40, wife of an expatriate Nur Mohammad, their daughters Rafi, 16, and nine month old Nuri.
Police said locals spotted the bodies after looking through the window of the deceased's house in the afternoon and informed police.
Expatriate Nur's brother Abdul Khalek, said Majeda use to live at the house with her three daughters and mother. Her elder daughter and mother went to visit Alikadam on Thursday morning and yet to return.
Superintendent of Bandarban Police, Jerin Aktar, said the details over the matter will be disclosed after investigation.