About 10.50pm, police were called to the service station following reports of an armed robbery.

Police were told two men, one armed with a firearm, entered and threatened a 21-year-old male staff member.

The pair fled on foot along Summerhayes Road, taking cash.

The employee wasn't injured.

Detectives want to speak to two men who may be able to assist them.

Both men are described as being of large build, wearing dark hooded jumpers and masks.

One of the men was also seen wearing blue shorts and thongs.

The second man was seen wearing dark tracksuit pants and a black backpack.

■ Call Crime Stoppers on 1800 333000.