Mandurah Police are calling on the public's help as they continue to investigate the assault of a man in Erskine.
The victim, a man in his 30s, was walking his dog along Sticks Boulevard around 4.20pm on August 11, when he was approached by two men on Harley Davidson motorcycles.
"The motorcycles were left in the middle of the road during the assault, causing traffic to bank up," a WA Police spokesperson said.
"The victim was conveyed by ambulance to Peel Health Campus for medical treatment."
Investigators believe a number of witnesses in the area may be able to assist with the investigation.
Detectives are seeking dashcam footage of Sticks Boulevard and the surrounding area between 4.40pm and 5pm.
Anyone with information or vision relating to this incident is urged to contact Crime Stoppers on 1800 333 000 or report on www.crimestopperswa.com.au.
Nedlands artist takes out Rockingham's Castaways Sculpture Awards
Huge mythical glowing creature to feature in Kwinana's OMG! Festival
Works underway on final stage of Baldivis Sports Complex
Samantha Jade to perform at Mandurah Christmas Carols in the Park
WA red P-platers to be restricted to one passenger
Weather heats up in Mandurah, Rockingham
Castaways sculptures land in Rockingham
Peel mental health service, eating disorder clinic another step closer
Smoke alert issued for Karnup, Baldivis