A spokeswoman says a Northwest Airlines plane has made an emergency landing in Iowa after crew members smelled smoke during a flight from Detroit to Los Angeles.

Northwest spokeswoman Susan Elliott says Flight 335 landed without incident at the Waterloo Regional Airport around midmorning Tuesday, about an hour into its flight.

Elliott said there were 182 passengers and a crew of eight on board. No one was injured.

Elliott said the flight crew diverted the aircraft to Waterloo as a precaution after reporting a "smoky odor" in the cabin.

She said Northwest was flying mechanics to Waterloo inspect the Boeing 757 and was arranging for an extra flight for the stranded passengers.