An incident is being investigated at Dulles International Airport, according to an airport spokesperson.
Sources tell FOX 5 that a threat has been made and that the situation involves a security breach that has officers and K-9 units going through two parking garages that are directly across from the terminal as well as the tunnel that connects them.
Officers are not allowing people inside the garage, telling them they may have to wait until as long as midnight to access the garages.
The airport says flights are not affected and the terminal remained open.
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