skade88 writes with a report that "The United States Capitol has been put on lockdown after shots were fired. Reports indicate a policeman was injured."
From the story: "The FBI was responding to the unconfirmed reports of shots, and a helicopter landed in front of the Capitol. A message from the Capitol Police ordered anyone in a House office to 'shelter in place.'
'Close, lock and stay away from external doors and windows,' the message said." Doubtless more to come on this; watch this space for updates. Update: 10/03 19:08 GMT
: ABC News reports that the shots followed an attempt to ram the White House gates
; the police subsequently shot and killed the driver. Other than that the driver was a woman, the reports adds little detail. Update: 10/03 19:19 GMT
: Reuters' U.S. Politics Live
feed is currently collating many reports from the scene. Of note: the lockdown itself was brief, and has been lifted.