Serbian authorities seized more than 160 kilograms (353 pounds) of heroin.
The drugs were discovered in a truck with Turkish registration plates, which was entering Serbia from Bulgaria, the customs officers said.
They said the street value of the heroin was estimated at 5 million EUR(US$7 million).
Balkans is a key route for smuggling of heroin and other drugs to Western Europe.
The British Prime Minister cuts a sociopathic figure, isolated, stubborn beyond belief, totally wrong and convinced that the world gravitates around her feet
The Basmanny Court of Moscow arrested Michael Calvey, the founder of Baring Vostok investment fund, on allegations of embezzling 2.5 billion rubles from Vostochny Bank. Calvey will be held in custody until April 13