Police recovered the throat-slit bodies of a couple and their son in Sonapahar area at Jorarganj union under Mirsarai upazila of Chattogram on Thursday morning.
The deceased were identified as Mostofa Mia, 70 his wife Josna Akter, 55 and their son Ahmed Hossain, 25.
Officer-in-charge (OC) of Jorarganj Police Station Nur Hossain Mamun said, the reason behind the murder could not be known immediately.
The matter is being investigated, he said, adding details will be informed later.
Police, however, detained Mostafa's elder son Sadek Hossain Saddam for interrogation.
BDST: 1223 HRS, OCT 14, 2021