EUGENE -- Police say an Oregon man shipped more than $1 million worth of marijuana to another state via UPS last week, packing the drugs inside of artificial boulders he made himself.

The Eugene Register-Guard reports that Curran Millican Manzer, 36, of Waterville, Oregon, made shipments to another state where marijuana is illegal. Springfield Police Lt. Scott McKee declined to identify the state and said the number of shipments is still being determined as part of an ongoing investigation.

Marijuana is legal in Oregon, but it remains illegal at the federal level, and shipping it across state lines is considered drug trafficking.

Manzer faces charges of felony laundering a monetary instrument, felony unlawful manufacturing of marijuana, and misdemeanor charges of unlawful delivery of marijuana and unlawful possession of marijuana. It wasn't immediately clear if he had an attorney.

--The Associated Press