>> lieutenant commander scott williams telling us that he and other colleagues heard someone say, stay away get out of the cafeteria get out of the building, but not saying they heard gunshots or saw a gun. he is now in a safe place while law enforcement investigates what went on here. >> pamela brown, you have some new information to share. >> so we're learning a little bit more about what initially elicited this response. apparently there was a phone call placed to 911. someone said there was a shooting on the second floor of the building on the navy yard. law enforcement were made aware and the active shooter protocol was immediately activated. this is a place we've seen an active shooter situation before so police didn't want to take any risks here. they have searched the building here. so far we're being told nothing has been found and no one has been shot.