Police have released a composite image of a man who attacked a woman while she sat in her car at traffic lights on Monday.
The man is described as being in his early 20s, with dark skin, a slim build, black hair and unshaven facial hair.
Yvonne Kelly,33, was in her four-wheel-drive on North Lake Road near the Kardinya Park Shopping Centre at 11.30am when she saw a man crossing the road
Without warning, he ran towards the driver's side of the car and grabbed Mrs Kelly hair as she attempted to put her window up.
The man punched her in the face resulting in bruising and a chipped tooth. Mrs Kelly started driving forward and the man let go and ran away towards the Shell service station.
Mrs Kelly later received treatment for her injuries at Armadale Hospital.
Her husband Mark said what upset Mrs Kelly the most was that people witnessed the incident but no-one came to help.
Police would like to speak to anyone who witnessed the attack.
Anyone with information can call Crime Stoppers on 1800 333 000.