Humayun Kabir, officer-in-charge of Motihar police station, said Taslima Begum, wife of school teacher Rafiqul Islam, stabbed her son Kabbyo with a sharp weapon and tried to kill herself in the same way after locking the door.
On receiving information, police recovered the body of Kabbyo after breaking open the door around 11pm and rescued Taslima Begum from the room in unconscious state, said the OC. Police recovered a machete from the spot.
Later, she was rushed to Rajshahi Medical College Hospital where she is now undergoing treatment.
Family members of Taslima claimed that she was mentally sick.
However, local people said Taslima might have killed her son following a family feud. A case was filed in this connection.