The National Highway Traffic Safety Administration says it has launched an investigation into the safety of Tesla’s Full Self-Driving feature, or FSD, after at least one fatal accident involving a pedestrian.

The National Highway Traffic Safety Administration said it was looking into what Elon Musk’s electric car company called the full self-driving system.

The U.S. automotive safety regulator has opened a new investigation into Tesla's Full Self-Driving (Supervised) software after four reported crashes in low-visibility situations.

Tesla stock sandwiched between Tesla’s Robotaxi Day and its earnings. Friday still has the potential to deliver more volatility as investors weigh a new safety investigation related to the company’s driver assistance software called Full Self Driving,

Four crashes and one death could lead to a costly recall or FSD being banned.

Officials are looking into whether self-driving systems in Tesla vehicles are safe in fog, glaring sun or other "reduced roadway visibility conditions," the National Highway Traffic Safety Administration said Friday.

The US National Highway Traffic Safety Administration is investigating Tesla's Full Self-Driving system after multiple crashes in poor visibility, one fatal. The probe will assess system updates and its response to such conditions in millions of Teslas.

The National Highway Traffic Safety Administration is looking into the driver-assistance system available in more than 2 million vehicles.