The accident in Tempe, Arizona, marked the first fatality from a self-driving vehicle, which are still being tested around the globe, and could derail efforts to fast-track the introduction of the new technology in the United States.
At the time of the accident, which occurred overnight Sunday to Monday, the car was in autonomous mode with a vehicle operator behind the wheel, Tempe police said.
A spokesman for Uber Technologies Inc said the company was suspending its North American tests. In a tweet, Uber expressed its condolences and said the company was fully cooperating with authorities.