The U.S. Capitol & Capitol Visitor Center has been placed on lockdown.
The exact reason for the lockdown is not yet known.
Eyewitnesses described a large police presence in the area.
According to the Associated Press, police are responding to sketchy reports of woman who may have a gun at the US capitol.
The United States Capitol, often called the Capitol Building or Capitol Hill, is the seat of the United States Congress, the legislative branch of the U.S. federal government.
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