UPDATE: The lockdown was lifted shortly after being put in place.
The White House and Capitol are reportedly on lockdown after an airspace violation, according to ABC News.
A U.S. official tells ABC News that the plane is not believed to be hostile. Senior officials across the inter agency are currently monitoring the situatin.
According to NBC News, fighter jets have been scrambled.
A video from Cheddar's J.D. Durkin shows a Secret Service officer standing guard outside of the press room, and he reports that the press is being sheltered in place inside the briefing room.