On Tuesday, the police arrested seven suspects after conducting search in Bandidos premises in Helsinki and Nokia.
Lead investigator, Jari Räty from the National Bureau of Investigation said the arrested persons are held in suspicion of aggravated drug offences and almost all of them belong to Bandidos.
According to the police, the search conducted are part of a wider international pre-trial investigation.
Räty said, at the same time the search was being conducted in the country, local police in Germany and the Netherland also conducted searches in Bandidos premises.
Räty did not divulge the nature of the narcotic or its amount as the investigation is still in the early stages.
However,Räty confirmed the police have already began interrogating the suspects.