UPDATE 3:20 P.M. EST: The lockdowns at Capitol Hill and the White House have been lifted. Capitol police appear to have shot and killed a woman in a black sedan (see above), the same woman who drove into the White House gates before trying to escape in her car. She then tried to drive through a barricade, which is when police opened fire. A child was also in the car at the time.
Police say the situation has been stabilized.