Bulgarian customs have seized 12.56 km of heroin at Kapitan Andreevo checkpoint near the country\'s southeastern border with Turkey, officials said here on Monday. The drug was found on Sunday in a Bulgarian car, entering from Turkey and driven by a 49-year-old Bulgarian, the customs said. The heroin was split into 24 packets wrapped with scotch tape before being packed into the car, the customs said. The driver said he knew nothing about these packages. Bulgaria, with 20,000 to 30,000 heroin users, is a transit country for the highly addictive drug. The country seized more than 300 km of heroin in 2010.