Bayswater Police are seeking information regarding an indecent act that occurred in Ashfield on Monday 10 February 2020.
A man was sat down near a girl and smiled at her before he was seen performing an indecent act.
Police have released a CCTV image of a man who they believe may be able to assist them with their investigation.
He is described as about 18-20-years-old, fair skinned, slim build with light curly hair wearing shorts, white short sleeved t-shirt and a black baseball cap.
If you have any information about the identity of this man or details of this offence please contact Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au. You can remain anonymous if you wish and rewards are available once charges are laid. Please quote Reference Number 9541