Police are investigating the armed robbery of a take away store in Berserker this afternoon.

Around 4.20pm three females entered the shop on Blanchard Street, approached the counter and produced a star picket to threaten a male employee.

The employee fled to a room at the rear of the business and locked the door.

The trio then stole a sum of cash from the register, before fleeing on foot with a fourth female, believed to have been waiting outside the business.

No one was injured as a result of the incident.

The females are all described as being Aboriginal and juveniles.

Upon arrival, a number of officers patrolled the area, however could not locate the females.

Anyone who may have seen the females or have further information is urged to contact police.