A week ago, Tesla showcased futuristic robotaxis. Then a pedestrian got hit.

The United States government's road safety agency is again investigating Tesla's "Full Self-Driving" system, this time after getting reports of crashes in low-visibility conditions, including one that killed a pedestrian. The National Highway Traffic Safety Administration says in documents that it opened the probe on Oct. 17 with the company reporting four crashes after Teslas entered areas of low visibility, including sun glare, fog, and airborne dust. In addition to the pedestrian's death, another crash involved an injury, the agency said. Investigators will look into the ability of "Full Self-Driving" to "detect and respond appropriately to reduced roadway visibility conditions, and if so, the contributing circumstances for these crashes." The investigation covers roughly 2.4 million Teslas from the 2016 through 2024 model years.