The body of the girl, Meenakshi, was found last night, police said.
"The girl has injury marks on her forehead. We are investigating the case from all angles. The body has been sent for postmortem. A case of kidnapping and murder has been registered," a police official said.
The parents of the girl, Meenakshi, had informed police that she had gone missing on Friday at around 9 PM when she was playing outside their home in Mongolpuri area, they said.
Immediately, her family members and neighbours had started looking for her and later in the night, her parents had lodged a case of kidnapping at Mongolpuri police station, they said.