The U.S. National Highway Traffic Safety Administration (NHTSA) has contacted Tesla after footage shared on social media appeared to show its newly-launched driverless cars breaking traffic laws.
The firm's long-awaited robotaxis - which boss Elon Musk says are central to Tesla's future - were tried out on public roads for the first time in Austin, Texas, on Sunday.
Videos posted online seem to show instances where the vehicles, which had a safety driver in the passenger seat, drive erratically.
In a statement, the NHTSA said it was "aware of the referenced incidents and is in contact with the manufacturer to gather additional information."
The BBC has contacted Tesla for comment.
