Shooting at/in US Holocaust Museum in DC.

Late Update: We're getting scattered early reports. Eyewitnesses on the scene, reported by CNN, speak of five shots being fired inside the Museum. Another unconfirmed report says that one gunman is in custody and that either two or three people (including the gunman) were shot.

Latter Update: Further reports suggest three victims of the shooting, one critical, in addition to the suspect who was apparently shot leaving the Museum.

1:46 PM Update: The most recent news suggests that there are only two gunshot victims -- a guard at the museum and the shooter himself. Wapo says there was a third gunshot victim. But other reports suggest the third person may have been cut by flying glass. This AP story notes the contradictory reports.

1:53 PM Update: A big and obvious question about this incident is how someone got a gun inside the Holocaust Museum, which presumably has heavy security. A current police press briefing suggests that the gunman was either in or rushing the entryway where the security set up is located, and that that is where the exchange of gunfire took place ... the police spokesman answering questions was PIO David Schlosser.