More state lab tests show the white powder found in an envelope opened in North Carolina's old Capitol building this week isn't hazardous.
The Department of Crime Control and Public Safety confirmed on Tuesday additional tests performed on the powdery substance showed no signs of things like anthrax, toxins and viruses.
An assistant for Gov. Beverly Perdue's chief of staff opened the envelope Monday afternoon, leading to an evacuation. The building houses offices for Perdue and others and the old House and Senate chambers.
While employees returned to work Tuesday, the 170-year-old building in Raleigh remained closed to the public but should reopen Wednesday.
The State Capitol Police and the FBI are investigating. The envelope was addressed to the state Capitol and contained a letter inside.