Police recovered the bodies of a woman and her two kids from a house at Baharkasna area of Rangpur town on Sunday noon.
The law enforcers have arrested the husband of the woman for interrogation.
The deceased were identified as Ratna, Neha, 3, and Babu, 1.
Confirming the news, deputy commissioner of Rangpur Metropolitan Police Kazi Mottaki Ibnu Minan said that they are suspecting that husband Abdul Rajjak might have killed his pregnant wife and two children over family feud.
Later, he also tried to kill himself, he added.