There was no white powder, after all, inside a suspicious package that forced the evacuation of 400 to 500 people from a National Guard office in Draper on Tuesday morning, according to officials.

Postal Inspector Bob Maes said there were alerts throughout the country on Tuesday warning about a suspicious packages delivered to National Guard offices.

Maes said he did not want to disclose too much information about what made the package suspicious out of fear of copycat cases, but he said mailroom employees are trained to identify suspicious items.

Initial reports from local National Guard officials said there was a white, powdery substance found inside the mail room, but Maes said that information was wrong.

"There were some correspondence inside," Maes said. "But there were no threats. There was no powder or any other substances either."

The incident remains open, but there is no criminal investigation since the package was not dangerous, Maes said.