(WZZM) — The U.S. Postal Service is seeing an uptick in business, but not necessarily in a way it wants.

California drug dealers are using Priority Mail and Express Mail to send narcotics to Michigan. In separate incidents this week, cocaine and marijuana were mailed to people in Muskegon and Wyoming.

A Priority Mail parcel filled with contraband arrived in Grand Rapids Sunday from Los Angeles. It contained 16 ounces of cocaine and a pound of marijuana. The recipient, a convicted drug dealer from Muskegon, was arraigned today in U.S. District Court in Grand Rapids on drug trafficking charges.

Postal inspectors say the two services are popular with drug traffickers because of reliability, free Internet and telephone tracking service and a perception there’s a minimal chance of being caught.

Drug traffickers turn to Express & Priority Mail