U.S. Capitol police say several people - including police officer - hurt in shooting. — KFI NEWS (@KFINEWS) October 3, 2013
UPDATE 11:39 AM: According to the Washington Post, "No one would say whether any shots were fired inside the capitol." The Post quotes a Senate Sargent at Arms who says there were injuries. Also from the Post: "I am told shooter has been arrested. House floor activity stopped for now."
UPDATE 11:45 AM: Matt Yglesias points out that the same Capitol Police who are right now trying to protect Congress are suffering from the shutdown, too.
It's nice that he took a break from the shooting news to complain about President Obama's "violent rhetoric." (Most likely, it was an ill-timed scheduled tweet, but still...) Griffin is a very pro-gun member of Congress.
UPDATE 12:09 PM: Multiple sources say the shooter is in custody and lockdown has been lifted. NBC is reporting that the incident began as a car chase that began when a car tried to ram through the White House gates. The chase reportedly then led to outside the Capitol building.
UPDATE 12:20 PM: Looks like the crisis is over, and so is this live-Slog. Any update and new information about the shooting will come in the form of new Slog posts.