Police and witnesses say gunfire outside the U.S. Capitol today began when a woman tried to ram through a White House barricade with her car.
They say the woman then led police on a chase that ended outside the Capitol.
Police say the woman was taken into custody, and a young child who was with her was taken to a hospital.
A police officer was injured when the car crashed outside the Capitol, but the injuries weren't life-threatening.
Police say no officers were wounded by gunfire.
The entire Capitol complex was locked down for about an hour.
Both houses of Congress went into recess.
Witnesses say at least 20 police cars were involved in the car chase toward Capitol Hill. One tourist says he walked toward the scene, curious about what was going on but then he "heard the gunfire" and hit the ground.
Police believe the shooting is an isolated incedent, not an act of terrorism.
The House had just approved legislation aimed at partly lifting the government shutdown by paying National Guard and Reserve members when the warning sounded.