A total of 174 kilograms of heroin was seized near the southwest port of Odessa, Ukraine, in the largest drug bust this year, the country`s security service said Monday, according to RIA Novosti.

The operation, which also involved the U.S. Drug Enforcement Agency and Turkey`s law enforcement authorities, led to the arrest of a group of Turkish nationals. According to law enforcement officials, the drugs were being smuggled from Iran to Western Europe, through Azerbaijan, Georgia, Ukraine, and Poland.

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"This is one of the largest hauls this year," a spokesman for the security service organized crime department said.

The drug haul was discovered in a truck that was traveling from Georgia.

Ukraine`s Security Service has confiscated over 460 kilograms of heroin worth $32 million this year, which is more than the total heroin seized for the last 15 years.