The gang had trafficked in methamphetamine from Estonia and distributed it mainly in the Kuopio region.
Methamphetamine is a more potent drug than amphetamine. The three kilograms of methamphetamine smuggled in had a street value of about 100,000 euros.
The police impounded one kilogram of the haul last autumn.
Five of the accused were handed a prison sentence of about six years.
Two others were also given lengthy prison terms – one of five years and the other four and a half.
The rest of the convicts were sentenced to a few months in prison or fined.
