Five suspects operating from northern Greece managed to smuggle into Bulgaria roughly 500,000 contraband packs of cigarettes since May 2010, police in the northern city of Serres announced on Thursday.
The suspects used a bus that belonged to one of them in their illicit activities.
The trio was arrested after police stopped the vehicle on the Serres ring road and discovered 17,500 packs of contraband cigarettes hidden in a specially designed crypt.