Mitchell Crime Investigation Unit detectives are investigating an armed robbery at Wallan’s United service station on Tuesday, July 17.
A man, allegedly armed with a knife, entered the High Street premises shortly before 4.50am.
The man threatened and made demands to the employee before fleeing with an amount of cash in a black Mercedes Benz.
No one was injured as a result of the incident.
Investigators have released a number of CCTV images of the vehicle and a man who they believe may be able to assist with their enquiries.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au.