Custom officials in South Korea are reporting that the postal service is a favorite of drug smugglers to transport their product.

From The Korea Times:

International mail, parcel and express cargo services are emerging as the most sought-after routes for drug trafficking here.

According to Incheon Airport Customs Tuesday, customs officers detected 69 cases of drug smuggling using international mail or parcel services and six using express cargo service in the first seven months of the year, accounting for 87.2 percent of all drug smuggling cases detected over the period.

Customs foiled 86 drug smuggling attempts between January and July, confiscating 16.6 kilograms of hallucinatory substances worth 5.1 billion won ($5 million), up 18 percent in weight from a year before.

International mail and parcel services are run by government or state-backed firms, while express cargo services are mainly offered by private transportation service providers such as DHL and Fedex.

“Such delivery services are available even without disclosing real names or ID numbers as long as there are names and addresses. It seems to be a major reason for the steep increase of drug trafficking through these services,” Lee Seung-kyu, a Incheon Airport Customs officer, told The Korea Times.

South Korea’s Black Market is currently ranked 10th in the world on the Havocscope Black Market Countries Index.