It is a busy time of year at the post office but mixed in with all of those holiday gifts being sent around the nation are packages containing controlled substances – many of which land in the hands of postal inspectors in San Diego.

NBC 7 obtained search warrants detailing this cat-and-mouse criminal activity.

According to these documents – part of the latest search warrant request from the U.S. Postal Inspection Service – drugs like Xanax, Ritalin, and even Ecstasy are being mailed off in packages, with San Diego serving as the middle ground between Mexico and cities across America. Read more at NBC San Diego