A 23-year-old man, Sushant, was arrested in Faridabad for allegedly murdering his 3-year-old stepson.
The victim, Aditya, was living with his maternal grandparents when the incident occurred on Sunday.
Police investigations suggest the motive was linked to the stepfather's resentment over the mother's frequent visits to see the child.
The accused has been taken into police custody and is set to appear before a city court.