D.C. NBC 4 reporting TWO shooters, one of them having been confronted/cornered by police.
Also reporting 10 or 12 victims. One dead. Four dead. One policeman. Two policeman. From separate sources.
NBC 4 TV D.C.:
http://www.nbcwashington.com/news/local/Confirmed-Shooter-at-Navy-Yard-One-Person-Shot-223897891.html#comments
Medical teams EMS lots of activity here (10:30 AM EST):
http://www.broadcastify.com/listen/feed/2455/web
Persons injured evacuated from rooftop via helicopter.
The other thread says THREE shooters.
Anyone know if this is true?