Mandurah detectives need the public's help with their investigation into a robbery which left a teenage boy with injuries.
On Monday morning around 10.00am a 17-year-old boy was approached by and physically assaulted by an unknown man on Eaglemont Street in Greenfields, near the Woolworths shopping complex.
The victim's necklace was stolen during the altercation before the attacker fled the scene.
The teenager was taken to Peel Health Campus with minor injuries.
Detectives are asking anyone who may have CCTV, dash cam footage or any information relating to the incident to call Crime Stoppers on 1800 333 000 or make a report online at www.crimestopperswa.com.au.