Katonah Fire Department was dispatched to a three-car MVA on I-684 near the Saw Mill River Parkway around 7 a.m. this morning. One car was hit by a tractor trailor and subsequently hit another car. The driver of the car hit by the tractor trailor was transported by Katonah-Bedford Hills Ambulance Corps with minor injuries. The driver of the other car and the truck driver were not injured. Traffic was backed up southbound while the scene was controlled and the cars were removed. KFD members assisted with scene safety and traffic control, and were on scene for approximately one hour.