A woman suspected of being involved in a car chase across central Washington was shot and killed by police outside the U.S. Capitol building this afternoon.
The incident, which sparked a lockdown of Congress, began when the woman tried to ram through security barricades outside the White House.
An official said a Capitol policeman was injured when the car driven by the suspect crashed outside the Capitol.
The U.S. House of Representatives and Senate were in session when gunshots were heard.
Officials said it was an isolated incident and had no connection with terrorism.
A source familiar with the situation said the incident started when a vehicle struck a security barrier at 15th and Pennsylvania avenue, near the White House. Police chased the vehicle for about 1 1/2 miles to 2nd Street and Constitution Avenue, near the Capitol, where the shots were fired.