CASA GRANDE — Three people were killed and at least 12 injured after a dust storm led to multiple crashes Tuesday on Interstate 10 between Phoenix and Tucson, authorities said.
Arizona Department of Public Safety officials said 19 vehicles, including at least six big rigs, were involved in chain-reaction collisions south of Casa Grande shortly after noon.
Television footage showed several cars and tractor-trailers smashed into each other near Picacho Peak in south-central Arizona, with at least one passenger car pinned between two 18-wheelers and others wedged under big rigs.
Medical helicopters airlifted several of the injured to hospitals in Tucson and Phoenix, and DPS officials said at least one person was in critical condition.
The names and hometowns of the three people killed weren't immediately available, authorities said.
The Picacho Peak area is prone to dust storms that develop suddenly and can quickly reduce visibility to zero for drivers.
The National Weather Service had issued a blowing dust advisory shortly before the crashes, with wind gusts of up to 30 mph reported in the area.
DPS spokesman Bart Graves said Tuesday's crash was one of the worst chain-reaction accidents in that area in the past seven years.