A chain-reaction accident Thursday on Interstate 75 killed at least three people and injured 15-20 others in Detroit, state police said.

The accident started shortly before 9 a.m. over the Rouge River Bridge, said Robert Morosi of the Michigan Department of Transportation. At least 30 cars were involved in the pileup, he said.

Snow was falling at the time of the crash, Morosi said, describing conditions as a "typical Michigan winter morning."

The jaws of life were used to pull people out of three vehicles, State Police Lt. Michael Shaw said.