An apologetic armed robber who has hit five service stations in two weeks could be living nearby.
Police said the man had robbed businesses in Sunbury, Woodend and Sydenham over the past fortnight.
Detective Senior Constable John Cheyne said the man had been armed with a 30 centimetre kitchen knife during the first four robberies, and a plaster saw of a similar length during the last robbery on Friday.
Detective Senior Constable Cheyne said the man had not made violent threats and was polite and apologetic during the robberies.
The offences occurred:
♦ At Horne Street in Sunbury shortly before 1am on January 27.
♦ At Gap Road in Sunbury about 5.45am on January 27. This was the only armed robbery where there were two offenders.
♦ At High Street in Woodend about 11.15pm on January 30.
♦ At the corner of Nelson Highway and Overton Lea Boulevard in Sydenham about 1.05am on February 2.
♦ At Gap Road in Sunbury, the same service station that was robbed in the second offence, about 3.30am on February 8.
Fawkner Embona Taskforce detectives have released a CCTV image of a man they would like to speak to in relation to the incidents.
He is described as being Caucasian and around 180 centimetres tall with a solid build.
He was wearing a grey hooded top with maroon sleeves during one of the robberies.
Anyone with any information is urged to contact Crime Stoppers on 1800 333 000 or www.crimestoppers.com.au.