screamed, saw the car plow into the band just past my balcony at that point, it hit at least two people, rolled over both of them and then continued down the road. reporter: in the city s livestream you can see a marching band playing. the red suv then barrels down the street, moments later, the video shows a police officer chasing after the vehicle. we have multiple casualties. 15 people down in the street! reporter: according to the city of waukesha, at least five people are dead and over 40 injured. the vehicle struck more than 20 individuals. some individuals were children and some fatalitiyies as a resu of this incident. reporter: at least 28 hurt were treated at local area hospitals. we do not have any specifics on the injuries at this time. all of the patients were transported. reporter: authorities are investigating the event this morning. we re no longer looking for a suspect vehicle. we do have a person of interest in custody at the moment but