called in recently against airplanes and the white house press briefing room. authorities didn't know where that phone call was coming from. again, they determined that was a hoax. we haven't been able to determine that in this case because authorities aren't ready to come to any sort of conclusion as they try to figure out why that phone call was made. so far no one has been shot nothing has been found. >> you're looking at the enormous police response. unconfirmed report of an active shooter. they've found no sign yet of an active shooter, no sign of injuries, no signs of shots fired right now. but enormous police presence around the washington navy yard right now. and the response st being felt beyond the navy yard all over the city of washington. i want to go to jim acosta. precautions are being taken right where you are right now. >> reporter: that's right.