Police said the child was attacked by a group at a park on Tivoli Avenue in Greenbank between 5.30pm and 6.20pm on Saturday evening. The group made offensive remarks to the child during the assault. The child's age has not been disclosed.
The child sustained injuries and was taken to hospital for treatment.
Police could not confirm how many people were in the group or provide any distinguishing features of those involved.
In a separate incident on Sunday morning, police attended a property on East Sentinel Drive where unknown persons had spray-painted the exterior of a house with offensive language and prohibited symbols. That incident occurred sometime between midnight and 9am.
A police spokesperson could not confirm whether the two incidents are linked but urged anyone with information to come forward and contact authorities.