DENVER (AP) — A Denver-area man has been sentenced to six years in federal prison for mailing threatening letters, some with white powder, to President Barack Obama, members of Congress from Colorado and Alabama, and Argentine consulates.

The U.S. attorney’s office for Colorado says 42-year-old Jay Stuart DeVaughn of Aurora, also known as Jay Paige Edwards, was also sentenced Friday to three years of supervised release.

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DeVaughn pleaded guilty in August to mailing threatening communications and conveying false information to elected officials. Authorities say he mailed a letter to Obama that was intercepted in September 2009. The envelope contained a plastic bag of white powder and a reference to anthrax.

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Authorities say the white powder in all the letters was harmless, but emergency personnel were called when the various offices received the mail.

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