DEVELOPING: The Washington Navy Yard where a gunman killed 12 people in 2013 is on lockdown Thursday after reports of an active shooter. The National Military Command Center confirmed reports that shots were fired on the installation. U.S. Park Police told FoxNews.com that officers are at the scene. The first-responders on scene are engaged in “a very time-consuming process that cannot be rushed,” Frank Wuco, former Naval Intelligence Officer, told Fox News. 

A heavy police and fire department presence begins blocks away from the Navy Yard, with roads blocked off and a helicopter hovering overhead. The scene is unfolding about a half mile from the U.S. Capitol. Lt. Cmdr. Scott Williams, who is stationed at the facility, described a chaotic scene. He said he heard shouting and law enforcement officers told him to exit the facility. FULL REPORT