A mentally retarded woman tried to end her life after allegedly killing her five-year-old son in Chandidasgati village of Sadar upazila on Friday night.
The deceased was identified as Limon, son of Imrul Kayesh and Lipi Khatun.
Nazrul Islam, officer-in-charge of Sadar police station, said that Lipi suffocated her son to death when other family members were busy with household chores.
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Later, he tried to kill herself by slitting her wrist with a blade. However, she was rescued by the family members and rushed to a local hospital.
"We have taken the body into our custody. A probe is also on," the OC said.