Fifteen people are suspected of various drug offences. According to the police, most of the suspects do not have a criminal history.
Two men in their twenties from Lahti have been jailed in the town on suspicion of aggravated drug offences.
The police suspect that different people have sold more than 15 kilograms of marijuana with an estimated value of 200,000 euros.
The first growhouse was uncovered in Lahti during a search in a detached house.
