The body of six-year-old girl was found dumped in the city of Kasur. The girl is the 12th child to have been murdered near the city in the past two years.
The suspected murderer is believed to be a serial killer because, in six of the cases, investigators found the same DNA. Another doctor said the bodies of the children bore similar injuries.
Authorities are now linking the cases together and believe the prime suspect will be found within a few days.