Ten people have been killed in a multi-vehicle crash on a highway in the American state of Florida. The pile-up occurred before dawn on Interstate 75 near Gainesville. Reports say it involved at least 12 cars and six trucks. The road was shrouded in a cloud of thick smoke caused by a bush fire, according to a report of the Associated Press. At least 18 people were taken to hospital and wreckage was strewn for nearly a mile (1.6km) along the road.