Uber suspends self-driving cars after a crash

Pictures posted online showed the car on its right side on a street in Arizona, next to another badly damaged vehicle, the BBC reported.

The car -- a Volvo SUV -- was in self-driving mode at the time of the crash, on Friday, Uber said in a statement on Saturday. No one was injured.

A police official said the accident occurred when the other vehicle "failed to yield" to the Uber car at a left turn.

"There was a person behind the wheel. It is uncertain at this time if they were controlling the vehicle at the time of the collision," the official said.

Uber's self-driving cars always have a human in the driving seat who can take over the controls.

The company pulled its self-driving vehicles off the road in Arizona at first, followed by test sites in Pennsylvania and California -- all three states where it operated the vehicles.