Afghan drug crop to flood Europe
European cities risk higher numbers of heroin overdoses as Afghanistan's record opium poppy crop floods cities with the drug, the UN has warned.
In a letter to European mayors, the head of the UN's Office on Drugs said it was likely more users would die.
Antonio Maria Costa said that an increase in supply tends to make the drug purer and hence more dangerous.
Mr Costa urged Europe's mayors to take precautionary measures ahead of the surge in the drug on their streets.
Europe has traditionally been the biggest market for Afghan opiates and opium cultivation in Afghanistan increased by 59% this year.