Uber has suspended its self-driving-car pilot programs in Pittsburgh and Arizona after one of its vehicles was involved in an accident late Friday night.

One of Uber's self-driving Volvo SUVs flipped onto its side after an accident in Tempe, Arizona. A photo of the aftermath showed another car in the background with dents and smashed windows.

A Tempe police spokeswoman told Bloomberg that the Uber vehicle was not responsible for the crash and that there were no injuries.

Uber had said it grounded its self-driving-car tests in Arizona. But an Uber representative told Business Insider that its self-driving cars were grounded in all three of the company's testing areas — Pittsburgh, San Francisco, and Arizona — following the accident.

The spokesperson said Uber's self-driving cars will hits roads again in San Francisco on Monday, but remain grounded in Arizona and Pittsburgh.

However, Uber has never used its self-driving cars in San Francisco to pick up passengers. The company is using two of its self-driving vehicles in San Francisco for mapping purposes. Those cars are always manually driven and never operate in autonomous mode.

Uber said it expects its self-driving cars to be back on the roads in Arizona and Pittsburgh soon, but didn't provide a precise timeline.

Uber first launched its self-driving-car tests in Pittsburgh in September. Since that time, the ride-hailing service has been picking up passengers in Ford Fusion cars retrofitted with Uber's driverless tech.

The ride-hailing service then attempted to launch its second self-driving-car program in San Francisco in mid-December, but ran into issues with the California DMV.

Uber had failed to obtain an autonomous-vehicle license before the launch, which led the California DMV to revoke registration of the company's 16 autonomous vehicles. Uber was planning to use its self-driving Volvo XC90 SUVs for that program.

Uber then shipped its autonomous SUVs on the back of its self-driving Otto truck to Arizona.

The ride-hailing company ran its self-driving-car tests in California for just a week prior to moving to Arizona. In that time span, Uber's self-driving Volvo was caught on video running through a red light on a busy intersection.

An Uber spokesperson said at the time the incident was due to human error, but internal sources told The New York Times the Uber was driving itself.

Since late January, Uber has been using two self-driving Ford Fusion cars to map routes in San Francisco, but the cars have not been driving themselves. The cars will continue to map routes on Monday.

Company scrutiny

The ride-hailing service is currently involved in a lawsuit over its self-driving technology.

Waymo, Alphabet's self-driving-car company, is suing Uber, alleging that the ride-hailing service stole the designs for its lidar system — a key sensor that helps self-driving cars detect obstacles. Waymo filed an injunction asking a federal judge to freeze Uber's use of its self-driving tech.

Uber has also been accused of promoting a sexist workplace. Former female engineer Susan Fowler wrote a blog post in February that details allegations of harassment and gender bias she said she experienced at the company.

Shortly thereafter, The New York Times posted a bombshell report detailing a company retreat where a manager groped several female employees and was later fired.

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