A service station at the Lakes on Great Eastern Highway is one of three stores targeted in three armed robberies on Sunday night.
The Regional Investigation Unit are investigating the three armed robberies in Beldon, Malaga and The Lakes.
At 11.30pm two men, one armed with a handgun and another with pepper spray entered a service station on Ocean Reef Road, Beldon.
One of the men sprayed pepper spray at the staff member before both men left the store.
It is believed no items were stolen.
The second incident occurred 40 minutes later at a service station on Beach Road, Malaga.
One of the men used pepper spray on the staff member before both men left the store with a sum of money.
At 2.40am on Monday the men attended a service station along Great Eastern Highway, The Lakes.
A staff member was threatened but received no injuries.
The men left the store with a sum of cash and cigarettes.
The three staff members did not require medical attention and no series injuries were received during any of the incidents.
The first man is described as fair skinned with a medium build, dark brown hair and a beard.
The second man is described as fair skinned with a medium build.
Detectives believe the men were switching items of clothing before each robbery.
The three incidents are believed to be linked and detectives would like to speak to anyone who may have information regarding these incidents.
Anyone driving in any of the incident areas between 11pm and 4am, who may have dash-cam footage or anyone with any information, is asked to call Crime Stoppers on 1800 333 000 or report online at crimestopperswa.com.au.
