Heroin and cannabis has been seized and a man has been arrested during a police raid in Portland on Thursday.
Portland police Sergeant Martin Flannery said three police units executed a search warrant on a South Portland address.
He said officers searched the property and located cannabis and more than three grams of heroin.
A Portland man aged in his late 40s was arrested and held in custody overnight.
Sergeant Flannery said the accused was charged with trafficking a drug of dependence and possession of heroin and cannabis.
The man will make a bail application in Warrnambool Magistrates Court on Friday.