11:31 AM: I'm seeing on Twitter that shots have been fired outside the Capitol building. There's not much information as of yet; I'll update this post as more comes in.
Police responding to shots fired outside Capitol building (via @learyreports) http://t.co/MCZcBFoOzt
— The Atlantic Wire (@TheAtlanticWire) October 3, 2013
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.
To be more precise, Capitol Police will have to skip their next paycheck if the shutdown extends: http://t.co/z1kj15BVTm
— Matt Yglesias (@mattyglesias) October 3, 2013
UPDATE 11:48 PM: Here's a screenshot of Arkansas Congressman Tim Griffin's Twitter feed:
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.