Geelong Crime Investigation Unit detectives are appealing for public assistance following three armed robberies at milk bars in the Geelong area last week.

Investigators believe that the same man is responsible for the three incidents.

The first armed robbery occurred at a milk bar in Detroit Crescent in Corio about 9am on Wednesday 21 October.

Police have been told that a man armed with a machete entered the store and threatened the attendant before stealing a large amount of cash.

He fled the scene and was last seen running north towards Dearbourn Parade.

The second armed robbery took place on Saturday 24 October about 1.30pm at a milk bar on McCurdy Road in Herne Hill.

It is believed a man armed with a knife demanded cash.

A small amount of cash was handed over and the bandit fled the scene.

He was last seen driving a red sedan from Matlock Street.

Police were called to the Herne Hill milk bar around 1.45pm this afternoon after it was robbed again by the same man who stole cigarettes.

No one was injured during the robberies.

The offender is described as about 175cm tall with a solid build and was wearing a peaked cap and dark jacket with red insert.

Detectives have released an image of a man that may assist with their enquiries.