The sentences were 6 years to 8 years in length.
The court also found the main criminal of the gang guilty of drug related crime while the pun-ishments for two criminals were tightened due to repetition of similar crimes.
A group of armed criminals tried to rob a GS4 vehicle carrying cash on the highway between Turku and Helsinki on February 25 this year.
The criminals stopped the vehicle by blocking the road and forced the driver out at gunpoint.
The driver was injured in the incident. The criminals fled the scene without any money in vans which were later found abandoned in a nearby parking area.