Ntando Easter Khakudi’s body was discovered by a passer-by in SNS on Sunday afternoon.
Her hands and legs were tied and she appeared to have been strangled, said Gauteng police spokesperson Lt-Col Lungelo Dlamini.
“It is alleged that the little girl was raped but we will wait for the post-mortem result to confirm that.”
Dlamini said a murder docket had been opened.
The victim’s aunt, Sarah Mthambo (48), said the little girl was last seen playing with her friends in Mthunzini Park in SNS on Saturday morning.