Suganya, wife of Senthlkumar, a milk vendor, last evening complained that her daughter sleeping in their house in Singanallur was abducted by unknown persons, they said.
On receiving the information, a special police team rushed to the house last night and carried out a search during which the baby's body was found lying in a plastic bucket full of water, police said.
Police said they were interrogating Suganya and an elderly woman in the house in connection with the incident.