[UPDATE] CNN is now reporting that the lockdown has been lifted. The incident was reportedly a car chase that happened to end outside the Capitol building with police firing at the driver.

[ORIGINAL]
The U.S. Capitol building and buildings in the surrounding area are currently on lockdown following reports of a shooting just outside the Capitol building. The authorities, including the Capitol Police, have responded to the scene.

CNN is reporting that one person was injured in the shooting. The claim is being attributed to Senate Majority Leader Harry Reid.

Capitol Police have sent out a “shelter in place” memo to congressional staff. The memo, in full, courtesy Talking Points Memo:

SHELTER IN PLACE. Gunshots have been reported on Capitol Hill requiring all occupants in all House Office Buildings to shelter in place. Close, lock and stay away from external doors and windows. Take annunciators, Go Kits and escape hoods; and move to the innermost part of the office away from external doors or windows. If you are not in your office, take shelter in the nearest office, check in with your OEC and wait for USCP to clear the incident. No one will be permitted to enter or exit the building until directed by USCP. All staff should monitor the situation. Further information will be provided as it becomes available.

Details on the incident are just coming to light. More details to follow as they are available.

In the meantime, Twitter is exploding with photos of the chaos surrounding the incident: