Russia now 'top heroin consumer'
Russia says it has become the world's biggest consumer of heroin.
The head of Russia's anti-narcotics service, Victor Ivanov, said that seizures of Afghan heroin were up 70%.
Speaking ahead of a meeting in Vienna of the United Nations Commission on Narcotic Drugs, he called on the UN to do more to fight the problem.
Mr Ivanov, a former KGB officer and senior Kremlin official, said the flood of the drug from Afghanistan posed a threat to Russia's national security.
He painted a grim picture, says the BBC's James Rodgers in Moscow. He said the drug was partly to blame for rising crime and a fall in Russia's population.