Istanbul police seized more than 400 kilos of illegal drugs including heroin and "skunk" cannabis during anti-drug operations in the city, said police sources yesterday.

Anti-drug teams impounded 310 kg of skunk hidden in a pickup truck coming from Croatia when it stopped in the Silivri district on May 17, said the sources, who spoke on the condition of anonymity due to restrictions on speaking to the media.

Separately, 130 kilos of heroin were seized in a truck carrying dates and halva to Europe from Iran when it was stopped in the city's Pendik district on May 20. Two suspected drug traffickers - one Croatian and one Iranian - were remanded into custody in the city.