SILVER SPRING, Md. (WUSA9) -- Hazmat crews are at the Maryland District Courthouse where someone brought a powdery substance into the building, officials said.
The courthouse is located at 8552 2nd Avenue, about two blocks from the Silver Spring Metro Station.
The substance was found in the lobby of the building, which has been evacuated. The area around the building is cordoned off, officials said.
Hazmat crews are trying to determine was the substance is.