TEMPE, Ariz. (CBSDFW.COM/AP) – Police in a Phoenix suburb stated that one of Uber’s self-driving vehicles struck and killed a pedestrian.

Police in the city of Tempe said Monday that the vehicle was in autonomous mode with an operator behind the wheel when a woman walking outside of a crosswalk was hit.

READ MORE: Motorcyclist Dies In Crash After Running Red Light, 2 Others Injured Frisco Police Say

Sgt. Ronald Elcock said in an email that the accident happened overnight, but did not say whether it occurred on Sunday night or Monday morning.

The woman died of her injuries at a hospital. Her name was not made public.

READ MORE: 2 Teens Dead, Another Injured After Shooting In Arlington, Police Say

(credit: ANGELO MERENDINO/AFP/Getty Images)

Uber has been testing driverless vehicles in the Phoenix area for months along with San Francisco, Pittsburgh and Toronto.

Uber said on Twitter that it is “fully cooperating” with the investigation and expressed condolences to the family of the victim.

MORE NEWS: Arlington Ban On Short-Term Rentals Stands After Recent Court Ruling

(© Copyright 2018 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)