CNN Wire Staff
Washington (CNN) - An envelope that ignited Friday at a Washington postal sorting facility was addressed to Homeland Security Secretary Janet Napolitano, a department official confirmed.
Metropolitan Police Chief Cathy Lanier would not comment on markings on the package, or if it contained a note, but she said it was "similar in nature" to devices that ignited Thursday in two Maryland state offices.
Those devices carried messages apparently decrying road signs that ask motorists to report suspicious activity, a government official said.
At least one device was found, police said.
U.S. Postal Inspector Pete Rendina said inspectors were screening mail at facilities in the Washington metro area.
Filed under: 360° Radar
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