Police are asking for witnesses to the assault to come forward.
Mandurah Detectives are investigating an assault on an eight-year-old boy that happened in Port Kennedy on Tuesday, July 4, 2017.
The incident occurred between 12pm and 1pm when the boy was near the bus stop on Warnbro Sound Avenue, near Stockton Road.
The boy was approached by an older woman who was screaming at him before hitting the boy to the face.
The boy and woman got on a bus together a short time later.
Police are appealing for witnesses to the incident.
If you have any information that can assist, please call Crime Stoppers on 1800 333 000 or make a report online at www.crimestopperswa.com.au.