Mandurah detectives are asking for public assistance in identifying a young man they say indecently assaulted a woman in Dudley Park on Tuesday.
A woman in her 20s was walking on Churchill Avenue about 12pm when she was assaulted by a young male, believed to be about 17 years old, police allege.
The attacker is described as being about 165cm tall, dark skinned, wearing a camo t-shirt, light chino trousers and a brown cap.
He was accompanied by two other young males at the time of the incident, both about 17 years old, but police say they were not involved.
One is described as being about 165 cm tall with fair skin, wearing a black shirt. The other is described as being about 175cm tall, light skinned with blonde hair and wearing a black hoodie, black Adidas pants and a black cap.
Anyone that was in the area at the time or with information is asked to call Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au.