DENVER (AP) — A new report says the amount of Colorado marijuana being seized en route to other states through the U.S. mail is on the rise since 2010.

The Rocky Mountain High Intensity Drug Trafficking Area says postal inspectors seized more than 493 pounds of pot from packages in 2013, up from 57 pounds in 2010, the year after medical marijuana dispensaries proliferated in Colorado. The state legalized marijuana for all adults over 21 in 2012, but it remains federally illegal.

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The report says Colorado marijuana was bound for 33 states — up from 10 — with Florida, Maryland and Illinois among the top destinations.

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Brian Vicente, a Denver attorney who helped write the pot law, says marijuana leakage into other states is an issue that voters agreed should remain illegal, but he is skeptical of the report.

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