A knife-wielding bandit robbed a man of his wallet outside a Noble Park home.
Greater Dandenong CIU Detective Senior Constable Brendan Fontana said the incident occurred in Noble Street about 11pm on Wednesday 29 March.
The victim told police that a Caucasian man armed with a knife demanded his wallet and money, and he complied.
The man then ran north along Allan Street.
The victim said the man was aged in his early forties, had a medium build and was wearing a black scarf or balaclava over his face, a dark blue raincoat jacket and jeans.
Call Crime Stoppers on 1800 333 000 with any information.