Police recovered the bodies of a woman and her son and daughter from a house.
The incident took place in Kalaroa Upazila of Satkhira on Thursday morning around 9 am.
The deceased were identified as Mahfuja Khatun (31), wife of truck driver Shimul Hossain, their son Mahfuj (9) and daughter Mohona (5), according to media reports.
Officer-in-charge (OC) of Kalaroa police station Mir Khairul Kabir confirmed the matter to media.
He said that preparations are underway to recover the bodies and send them to the morgue. And the matter will be investigated to know the actual reason.