mass-casualty incident. two people, in addition to a suspected gunman, have been shot. according to officers, the shooting broke out after a truck slammed into a home. michael from cnn affiliate whdh joins me now. so, michael, what have investigators uncovered, so far? >> hey there, pamela. still, very active scene here in winthrop. you mentioned it just outside of boston. i will step out of the way and we can zoom in. you can see that stolen-box truck there, still, inside of the building that it demolished several hours ago. at this point, we are told, by investigators, this all got started around 2:40, this afternoon. that stolen box truck driving through this neighborhood. it then crashed into another vehicle. before then crashing into this building. the driver, who stole the truck, then hopped out of the vehicle, according to police, and then started opening fire on those living here. we're told, a man and a woman who were in the area were shot and killed by that gunman. police arriving, a short time after that. they opened fire, hitting the suspect, several times. he was taken to the hospital,