Three people have been arrested following numerous drug raids across Melbourne.
The raids, part of a joint investigation that led to Victoria's largest heroin seizure in January, focused on 20 homes and businesses in Melbourne's northern and western suburbs.
A firearm, cash, diamonds, computer equipment and drugs including MDMA, cannabis and tobacco were seized during Tuesday's raids.
Victoria Police Commander Mick Frewen says the raids form part of an 18-month investigation by the joint task force into the trafficking of illicit drugs and tobacco linked to a Middle Eastern Organised Crime Group syndicate.
"They are essentially trafficking immense harm into Victoria and profiting off our community's misery, and they have absolutely no qualms doing this," he said.
A Fawkner man, Campbellfield man and a Greenvale woman were arrested on Tuesday and are being interviewed by police.
The joint task force is made up of Victoria Police, Australian Federal Police, Australian Criminal Intelligence Commission and the Department of Home Affairs.