The deceased was identified as Jannatul Ferdous, 25, wife of Mostafizur Rahman of Madaripur district.
Local people spotted the body of Jannatul and informed police who recovered the body in the morning, said sub-inspector Mir Mohamamd Arif Ali of Sabujbagh Police Station.
Police said Jannatul might have been attacked around 8 pm on Monday and died due to excessive bleeding.
However, Zarif Bin Mostafiz, two-year-old son of Jannatul, was found unhurt near the body.
Mostafizur Rahman, husband of the victim, said he was not at home during the incident and he came to know the matter from the neighbors.
Police detained Manir Hossain, caretaker of the house, for interrogation.
Amena Akter, paternal aunt of Jannatul, claimed that it is a preplanned murder.
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