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(NECN: Kathryn Sotnik) - It all started just after 2 p.m. Thursday.
In broad daylight, video captures a black Infiniti driving erratically just below the main stairway at the U.S. Capitol, with police in close pursuit.
That chase started just moments earlier at the White House. The female driver, now identified by NBC as 34-year-old Miriam Carey of Stamford, Conn., allegedly rammed her car into a gate there, failing to smash her way in.
Police soon surrounded her.
What ensued was a confrontation near the west side of the Capitol.
Carey's car was quickly surrounded by more police, but she violently surged back and forth then drove away as gunshots rang out.
"All the information that we have right now is this does not appear to be in any way an accident," said Metropolitan Police Chief Cathy Lanier. "This was a lengthy pursuit. There were multiple vehicles that were rammed. There was officers that were struck, and two perimeters, security perimeters that were attempted to be breached, so it does not appear in any way that this was an accident."
One of those police cars crashed into a security barrier, injuring the officer.
The Capitol Building itself and others were ordered locked down. Lawmakers and staffers were told to stay away from windows and doors.
Scared tourists also ran for cover, some hunkering down.
More dramatic video shows the injured officer being taken away by chopper. Thursday night, he is said to have non life threatening injuries.
"We have no information this is related to terrorism, or is anything other than an isolated incident," said Capitol Police Chief Kim Dine.
Police say the suspect, herself, did not fire at police, and was not armed at the time.
Now, many are wondering what Carey's motives were.