mbta, the transportation authority here, is sending buses to the watertown area to help remove the people who live there, evacuate some people, just get them out. get them to safety so they can do this manhunt and go door-to-door in the meticulous way they want. >> we do not want friendly fire if there will be fire going on. this is a residential neighborhood. so this is what law enforcement does, you get the citizens out and you now secure the area and hopefully as i have been saying when daylight comes, they'll be able to, he'll be more exposed than he has been. >> one of the ways they have been warning people in the watertown area is with phone calls, robocalls made to most of the residents there. let's listen to what it sounds like. >> there's an active incident in watertown right now. chief devoe is advising all residents to remain in their homes. if you hear or see anything suspicious, call the watertown