DENVER (AP) — Wyoming Gov. Matt Mead's says he's concerned about increased marijuana trafficking in his state as Colorado prepares to allow the sale of recreational marijuana to the public.

Colorado released rules Monday covering licensing, tracking, packaging and advertising of recreational marijuana sales. Colorado officials have emphasized the marijuana should be consumed in-state.

But Mead, a former federal prosecutor, says Wednesday he remains concerned about drug smuggling into his state and increased impaired driving.