Rockingham detectives are seeking information into a robbery in Bertram on Thursday, August 9.
About 11.40am, a 30-year-old woman was standing at the bus shelter on Johnson Road near the Bertram Community Centre, when she was approached by an unknown man.
The man punched her in the face and stole her laptop bag.
He was last seen running towards Price Parkway.
The man is described as 25-27 years old, fair-skinned, about 180cm tall, with a slim build and black hair in a mullet style.
He was wearing a black hooded top, black shorts and black Nike trainers.
Anyone who saw the incident or has any information should call Crime Stoppers on 1800 333 000 or make a report online at crime stopperswa.com.au.