The all clear has now been given at Republican presidential candidate Marco Rubio's Washington, D.C., campaign office after it was evacuated Tuesday afternoon due to a suspicious white powder that was found, a spokesman said.
Employees have evacuated to the roof of the D.C. office building, while hazmat crews are in the office, spokesman Alex Conant told ABC News.
The fire department is on the scene, and the FBI was in the process of responding the situation.
The investigation is ongoing.
