just began to shoot. we now know according to the metropolitan police chief, 12 people have been killed. there were multiple injuries. again, we are waiting for this news conference to kick up in washington talking about the state of some of those injured. but i want to take you specifically to the capitol, which is not too far away from the washington navy yard. that's where we have our chief congressional correspondent, dana bash. dana, bring me up to speed as far as whether or not the senate is on lockdown, what's happening where you are? >> reporter: the senate is technically on lockdown and has been for a little less than an hour. what that means is this door back here that goes directly into the senate is closed and members of congress who want to leave and come apparently can. that's according to some of the police officers i've talked to. but everybody else is not allowed to enter the building, not allowed to leave the building, and same goes for the three senate office buildings that are around the senate complex. however, if you look over here, if you can just pan over here, that of course is the house side