A woman allegedly killed herself after strangling her two-year-old son in Kachikata area under Shibchar upazila of Madaripur on Wednesday.
The deceased were Reba Khatun, 25, wife of Laltu Mia of the area, and her son Rayan. Laltu works at a local NGO.
The incident took place when Laltu went to Dhaka to attend a meeting, said Mohammad Sonahar Ali, assistant superintendent of police (ASP).
Reba often engaged in altercation with her husband over family matters.
Around 9:30pm on Wednesday, Reba took her life by hanging herself from the ceiling of her room after killing Rayan.
On information, police rushed to the spot, recovered the bodies and sent those to Madaripur General Hospital for autopsy, said the ASP.