Two people were murdered in separate incidents in Bagerhat and Natore districts over the last two days.
In Shikirdanga village in Rampal upazila of Bagerhat on Friday, a housewife slaughtered her husband in his sleep to draw an end to a suspected extramarital affair, before attempting suicide by taking poison.
Police said Halima Begum, 32, killed Sheikh Sirajul Islam, the 36-year-old son of Sheikh Belayet Hossain, with a kitchen knife around 6am while their son, Sohel, was attending the mosque for Fajr prayers. Their daughter, Jannatul, was sitting in their balcony.
In Natore, meanwhile, a middle-aged man was killed in an attack by a rival at Bilsa village in Gurudaspur upazila on Friday.
The deceased was Saidur Rahman, 48, son of Foyez Uddin of the village.
Police said there had been a longstanding dispute between Saidur and Mainul Islam over the ownership of a piece of land. As a sequel to the enmity, Mainul beat Saidur on the Bilsa Bridge at noon and threw him into the water.