Senior Superintendent of Police (SSP) Mandeep Singh Sidhu said a combing operation was launched immediately on receiving information regarding the disappearance of the child, Sehaj Singh, late last night.
Because of the operation, accused Jaspreet Kaur and her paramour Amandip Singh smothered the child to death and threw the body in a cattle shed of his family, he said.
The family reported the recovery of the child's body to police in the wee hours today along with other information, he said.
The child's father, Narvair Singh, too was a servant alongwith Amandip. Narvair had informed Fateh Singh about the illicit relationship between Amandip and Jaspreet.
Amandip was then removed from the job.
In order to avenge Amandip's removal from the job, the accused abducted Narvair's son and killed him, the SSP said.