This is a breaking news story. Check back for updates.
UPDATE 9:45 p.m. EDT: The supect, Miriam Carey, was a 34-year-old dental hygienist from Stamford, Conn., who once lived in Brooklyn, N.Y., according to several news reports. Police confirmed that the driver was shot to death after careening around the Capitol grounds and then crashing her leased black Infiniti at Second Street NE. There was no sign that Carey was armed, police told the Washington Post.
UPDATE 6:14 p.m. EDT: Authorities would not release any information about the suspect in the incident on Capitol Hill during a news conference that just wrapped up. But Capitol Police Chief Kim Dine said the incident does not appear related to terrorism. When a reporter asked if the suspect was of Somali descent -- why the question was asked wasn't clear -- Dine would not comment. Whether the suspect was armed was also unanswered.
Metropolitan Police Chief Cathy Lanier said video of the incident that has been shown on television only captures a portion of the series of events that led to the woman being shot and killed. Lanier said the suspect was shot at multiple times in different locations and that her car crashed on the 100 block of Maryland Avenue near the U.S. Capitol security booth.
A 1-year-old child was in the car and was said to be in "good condition" after the incident. Two officers were injured in connection with the incident -- one from Capitol Police and another from the U.S. Secret Service. They were not shot.
Dine said he spoke to the injured Capitol Police officer in the hosptial. "He's doing very well. He's going to be fine," the chief said.
UPDATE 5:23 p.m. EDT: CNN's Deb Feyerick reports that authorities are trying to execute a search warrant on the suspect's home in Connecticut. There's still no information on who the suspect is. A press conference by Capitol and D.C. police is scheduled for 6 p.m. EDT.
UPDATE 4:26 p.m. EDT: The female suspect killed in the Capitol Hill shooting was believed to be 34 years old. The car that she attempted to drive through the White House gate had Connecticut plates, according to NBC Washington. The child's age is believed to be between 1 year and 18 months.
UPDATE 4:26 p.m. EDT: MedStar Washington Medical Center says it received two patients related to the Capitol Hill shooting -- a female and a male Capitol Police officer, NBC Washington reports. More details are expected to be released at a news conference that is scheduled to start soon.
UPDATE 3:40 p.m. EDT: Capitol Police said they have no information that the incident was related to terrorism. It appears to be an isolated incident, according to authorities.
UPDATE 3:32 p.m. EDT: Capitol Police are expected to give a news conference momentarily on the incident. You can follow a live stream of the press conference here.
UPDATE 3:27 p.m. EDT: Politico is reporting that a child was one of two people removed from the vehicle that attempted to ram the White House gate. A man was also taken out of the vehicle.
UPDATE 3 p.m. EDT: The lockdown at the U.S. Capitol is over, police tell Washington Post congressional reporter Ed O'Keefe:
The Capitol has reopened, according to U.S. Capitol Police
— Ed O'Keefe (@edatpost) October 3, 2013
UPDATE 2:55 p.m. EDT: ABC News is reporting that the suspect, a female, was shot dead. She was shot after she tried to ram the gate of the White House, sources told the network. The network said an officer was also shot during the incident, but his condition was not immediately known.
UPDATE 2:51 p.m. EDT: The White House is under partial lockdown as a precaution, Mark Knoller of CBS News reports:
As a precaution in response to shooting on Cap Hill, WH in partial lockdown. Pedestrians moved across street.
— Mark Knoller (@markknoller) October 3, 2013
The Capitol building is on lockdown after shots rang out Thursday afternoon on Capitol Hill.
place," Capitol police wrote in an email to all House staff, Politico reported. “Close, lock and stay away from external doors and windows. Take annunciators, Go Kits and escape hoods, and move to the innermost part of the office away from external doors or windows. If you are not in your office, take shelter in the nearest office, check in with your OEC and wait for USCP to clear the incident. No one will be permitted to enter or exit the building until directed by USCP. All staff should monitor the situation. Further information will be provided as it becomes available.”
The Capitol speaker system ordered people in the Capitol building to shelter in place because of an active shooter, CNN's Ted Barrett reported.
MSNBC.com reporter Suzy Khimm, citing Capitol police, said an officer was “injured but not wounded” during the incident. She said it appears that the officer was not shot.
An unnamed U.S. House of Representatives employee told Khimm that the shooter has been apprehended.