Tajik caught in Russia with around Police in Kazan, the capital of the Russian Volga republic of Tatarstan, have confiscated more than 6.8 kg of heroin from a Tajik national, a local police source said on Thursday. "On searching him, police found heroin. Also, drugs were found in a flat he rented. A total of over 6.8 kg of heroin was confiscated," the source told RIA Novosti. Police are now establishing the origin of the drugs and its potential buyer. Tajikistan is a major transit country for drugs from the world`s largest heroin producer, Afghanistan, to former Soviet republics including Russia and some Western countries.