WASHINGTON (Reuters) - Amazon.com's ( AMZN ) self-driving unit Zoox agreed to recall 270 driverless vehicles after an unoccupied robotaxi was involved in an April 8 crash with a passenger car in Las Vegas.

Zoox said there were no injuries in the crash involving a Zoox robotaxi and a passenger vehicle. Zoox paused operations for several days pending a safety review of the incident and developed a software update to address the issue.