Police from Prahran Embona will investigate an armed robbery at a service station in St Kilda overnight.
Detectives have been told that two men entered the premises at the intersection of St Kilda Road and Alma Road just before 1.45am.
Armed with knives and with their faces concealed, one of the men approached the attendant within the store making threatening demands while the other jumped the counter through a wire grid.
The men made off with the cash register, leaving the store on foot and were last seen heading east on Alma Road.
One of the men was described as wearing a light grey hooded jacket and black shorts.
The other was described as wearing a black sleeveless puffy jacket with a grey and black horizontal stripe hooded jacket and dark coloured pants.
Both men are described as having a medium build.