A Harrisburg fire truck responding to an emergency collided with a sport-utility vehicle at an intersection Thursday night in a crash that ensnared two other vehicles and sent nine people to area hospitals. The crash at Cameron and Market streets occurred about 6:45 p.m. Among the injured were three firefighters and a 5-year-old girl. All of the injuries are believed to be minor. Police said City Tower One was eastbound on Market Street with lights and sirens activated when the northbound GMC Acadia struck the front of the truck. The colliding vehicles then struck two other vehicles at the intersection. Police said fire trucks generally have the right-of-way when headed to emergency calls. Drivers of emergency vehicles can proceed past red traffic signals after "slowing down as may be necessary for safe operation," according to state law.