Purnima (30), a mother of two boys, gave birth to a baby boy last month.
Last night, she claimed that unidentified chain snatchers sprayed some liquid on her face after which she fell unconscious and after gaining consciousness she found the baby's throat slit and her gold chain missing.
The baby was declared brought dead at a hospital.
Neredmet police registered a case of murder based on her complaint, said inspector S Ashok Kumar.
She is yet to be arrested though police registered a case of murder against her.
