Six women stole food from a Barragup service station overnight and attacked the attendant.
The attack happened at a service station on Pinjarra Road at about 1am.
Police said the women stole the food before one struck the 22-year-old male attendant to the face with an elbow, hitting him in the eye.
The women fled in a black sedan and are described as being aged between 18 and 25 years old with dark complexions.
Anyone with information is asked to contact Crime Stoppers on 1800 333 000.