Uber Technologies Inc. suspended its pilot program for driverless cars on Saturday after a vehicle equipped with the nascent technology crashed on an Arizona roadway, the ride-hailing company and local police said.

As Reuters reports, the accident, the latest involving a self-driving vehicle operated by one of several companies experimenting with autonomous vehicles, caused no serious injuries, Uber said.

Even so, the company said it was grounding driverless cars involved in a pilot program in Arizona, Pittsburgh and San Francisco pending the outcome of investigation into the crash on Friday evening in Tempe.