The woman was tortured to death at her in-laws' house in Illambazar area on Thursday night, a police officer said.
According to locals, a medical test to determine the gender of the baby was conducted a couple of days ago and the attack came after the test revealed the woman was pregnant with a girl, he added.
"The husband and sister-in-law have been arrested on the basis of the complaint lodged by the deceased's family."
Police said they are looking for the other members of the family, including the mother-in-law of the woman, who are at large since the incident.
Prenatal sex determination is banned in India.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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