Uber grounds self-driving cars after accident

Uber has grounded its fleet of self-driving cars pending an investigation into the crash of an Uber autonomous vehicle in Arizona, a spokesperson for the car-hailing service said Sunday.No one was seriously injured in the accident which occurred Friday in Tempe, Arizona while the vehicle -- a Volvo SUV -- was in self-driving mode, the company said."We are continuing to look into this incident and can confirm we had no backseat passengers in the vehicle," the Uber spokesperson said.