Uber self-driving test car involved in crash in Arizona (TechCrunch)
I think its still not determined what caused it, so wouldn't jump to conclusions.
Arizona Republic: "Another vehicle failed to yield while making a left turn onto Don Carlos Drive, colliding with the self-driving car, operated by Uber, DeSpain (an officer) said. A third vehicle was hit by one of the first two, but no serious injuries were reported, according to police".
http://www.azcentral.com/story/news/local/tempe-traffic/2017/03/25/self-driving-car-involved-tempe-accident/99612554/
Update - Uber to suspend self-driving tests in Arizona and Pittsburgh, though initial indications are that Uber wasn't at fault.
One thing to look at, even if Uber wasn't the cause of the accident, is how its collision avoidance system functioned, if engaged.
Uber has since said its vehicle, a Volvo, was using its self-driving controls at the time of the incident.
But
Recode's article on Uber's self-driving program is interesting reading.
Uber resumes self-driving car program in San Francisco after crash (Reuters)
But not in Pittsburgh, Arizona.
Now
Uber says its resuming self-driving operations with passenger pickups in Tempe and Pittsburgh.
But
some questions raised about how the Uber was being operated.