Bulgarian customs had seized 73.38 kg of heroin, the largest haul of heroin found in a car in the past five years, the National Customs Agency said on its website Wednesday. Inspectors found the drugs at Kapitan Andreevo checkpoint in southern Bulgaria in a Bulgarian car. The car was driven by a Bulgarian citizen, who was entering his country from Turkey, the agency said. The heroin, split into 140 packets wrapped in carbon paper, was hidden in a specially built secret compartment in the back seat, the agency said. Bulgaria is a popular transit country for drug trafficking. In the past two months, customs officers have seized 178 kg of drugs in total, including 100 kg of heroin.