A driverless shuttle bus being tested in Las Vegas was involved in a crash an hour into its first day on the job - although it wasn't the vehicle's fault.

The eight-seater vehicle, started as a pilot of Las Vegas' smart city infrastructure, experienced a minor collision after a delivery lorry reversed into it. While the vehicle stopped when it noticed the lorry reversing, it also failed to avoid it.

Several people were inside the vehicle when it was hit.

The incident is the latest in a series of crashes involving driverless vehicles, the vast majority of which have been caused by the other vehicle's driver.

Almost all the incidents recorded by Waymo, Google's autonomous vehicle arm, have been down to human drivers hitting the vehicles, and a major crash involving Uber's driverless cars in March was down to the driver of the other car.