Anthrax scare in Washington D.C.

Work ground to a halt at the offices of the American Psychological Association on Tuesday following the discovery of a letter filled with a white, powdery substance.

Police were called to the building near Union Station at 1 p.m. after the powdery substance fell from an envelope.

"There was a note that said, 'This is anthrax,'" Rhea Farberman, who works for the American Psychological Association, told

The paper was found in the building's first floor mailroom.

D.C. Fire & EMS spokesman Pete Piringer said that three employees of the American Psychological Association's mail room drove themselves to a local hospital, where they were decontaminated. No symptoms of anthrax infection were exhibited by the patients, Piringer added.

“Initially police said it was a white, powdery substance,” Piringer told “I’m not sure if that was actually the case.”

Hazmat units evacuated the building and closed several sections of area streets to investigate the letter, which was then removed by the FBI as part of an open investigation.

As of 4:40 p.m. the Washington D.C. fire department had tweeted that it was clearing out of the building after no hazardous materials were found by the hazmat team.