Tesla’s Autopilot system is under federal investigation. On Monday, the National Highway Traffic Safety Administration announced it is formally looking into the confidence of Tesla’s Autopilot Level 2 driver-assistance functions. In particular, federal investigators say this new probe will look into Tesla impacts with parked emergency vehicles. The government agency is aware of at least 11 impacts or fires, resulting in 17 injuries, as well as one fatality. Some 765,000 cars from Tesla, including the Model Y, 3,S and X, are covered by this new investigation.

According to an Workplace of Defects Investigation document, NHTSA describes the core dilemma as “subject vehicle crashes with in-road or roadside gracious responders.” Tesla vehicles have “encountered first responder scenes and subsequently struck one or more vehicles keen with those scenes,” the preliminary report said. “The keen subject vehicles were all confirmed to have been concerned in either Autopilot or Traffic Aware Cruise Control during the advance to the crashes.” The reported crashes took place between 2014 and 2021, with four of them occuring this year.

NHTSA did not today return Roadshow’s request for additional comment. Tesla does not employment a public relations department to field requests for comment.

NHTSA and the National Traffic Confidence Board have for years investigated various Tesla crashes intriguing the company’s driver-assistance technology. The system is a Level 2 technology on the SAE’s scale of autonomy, and does not provide any sort of autonomous driving technology. The National Transportation Safety Board last year spoke up near a lack of accountability for Tesla, but also regulators, including NHTSA, in the wake of high-profile fatal impacts in which drivers were apparently not in control. It also requested on NHTSA to implement more regulations surrounding driver-assistance technology and self-driving cars in the wake of Tesla’s “Full Self-Driving” beta.

This past June, NHTSA took its strictest stance yet on these new technologies as it mandated rupture reports for self-driving cars and driver-assist systems. If any vehicle equipped with one of these types of technologies is keen in a crash, the agency will require a characterize from the automaker within 24 hours, plus updates with instant information over the following days.