Customs inspectors seized 78.86 kilograms of heroin Saturday at the 'Kapitan Andreevo' checkpoint on the border with Turkey, announced the press center of the Regional Customs Agency in the country's second largest city of Plovdiv. The heroin has been discovered after the checkup of 'Citroen' automobile with German tags traveling from Turkey to Germany. The drug has been hidden in a special chamber underneath the car's floor and divided in 152 packages. The value is estimated at ten million leva (about 7.69 million U.S. dollars), but the price would triple on the black market, the Customs Agency explains. Two people have been detained -- the driver, who is a Turkish and German citizen, and a passenger with Turkish nationality. A written statement of customs violation has been drawn up, and the case has been referred to the competent authorities. Bulgaria straddles routes of international drug smugglers and routinely seizes large amounts of drugs on its borders with Turkey to the south, Romania to the north and Serbia to the east. Since the beginning of the year, the authorities at 'Kapitan Andreevo' have detained 330 kilograms of heroin during nine narcotics searches. Over the last eight years, Bulgaria has confiscated over 21 tons of drugs, but it is certain that much more has slipped through. 