An investigation is under way after a police chase through the heart of Washington DC ended with a woman driver shot dead and two officers injured.
Police and the FBI quickly sealed off and searched a house in Stamford, Connecticut, believed to be the woman's home, officials said.
Her car had rammed security gates at the White House and police opened fire as she sped off towards Capitol Hill.
A one-year-old girl was taken unharmed from the car by police.
The shooting happened two weeks after 12 people were killed and three injured in a shooting at the nearby Washington Navy Yard.
The woman has not been officially identified.
Although the reason for Thursday's incident is unclear, police said it was neither an act of terrorism nor an accident.
The incident began at 14:12 (18:12 GMT) when the driver of a black Infiniti sedan rammed security fencing at the outer perimeter of the White House, police told reporters.
Video shot by Alhurra TV shows a part of the chase near the Capitol
Tourists, congressional staff and senators watched as a convoy of police vehicles chased the car down Constitution Avenue outside the Capitol, where the two houses of Congress meet.