Four people have been arrested and are facing several criminal charges.
The police also found equipment suspected of being used in manufacturing methamphetamine in the raid on a family home at Afiamalu.
The Police Commissioner, Egon Keil, says he's sure there's more illicit material out there and his main concern is the safety of Samoans and visitors.
"If there's drugs, there's weapons. With that combination it's very deadly. It's something that needs to be addressed and it has to be addressed swiftly and that's what the Samoan police will do."