Elaine Herzberg, 49, died in hospital. We're fully cooperating with @TempePolice and local authorities as they investigate this incident.
In addition to Toronto, self-driving vehicle testing has been taking place in Phoenix, Pittsburgh and San Francisco.
Autonomous vehicles don't drive drunk, don't get sleepy and aren't easily distracted.
The accident in suburban Phoenix could have far-reaching consequences for the development of self-driving vehicles, which have been billed as potentially safer than cars with humans at the wheel.
Police in Tempe, Arizona have yet to comment.
Autonomous cars have been involved in incidents before, but this is thought to be the first time a collision has resulted in the death of a pedestrian.
Uber began testing self-driving cars in Tempe in February 2017. The crash appears to be the first time a self-driving vehicle has killed someone-and could alter the course of a scantily regulated, poorly understood technology that has the power to save lives and create fortunes.
National Transportation Safety Board officials also confirmed that they would be sending a team to Arizona for the ongoing investigation on social media.
Ironically, proponents of self-driving cars claim the technology can help to greatly reduce the number of traffic-related pedestrian deaths.
The authorities in Tempe, Arizona, have confirmed this death was caused by a driverless Uber auto.
"Arizona has been the wild west of robot vehicle testing with virtually no regulations in place", said Consumer Watchdog, a non-profit consumer advocacy group, in a statement. The Swedish auto brand is owned by China's Geely.
"Since the executive order, Arizona has become home to testing for numerous technology and automotive companies that are leading the innovation into the new frontier". A human driver is required to handle much of the driving.
"In the very least, it calls for a serious reevaluation of the licensing regime for self-driving cars".
She noted a case in which putting stickers on a stop sign could fool autonomous vehicle sensors into seeing it as a sign indicating a speed limit.
It recommended giving the privacy commissioner greater reach over how auto companies use drivers' information, including whether personal information can be monetized, and giving federal cybersecurity officials a bigger role in protecting the new technology from hackers.