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.

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

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,

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 government's road safety agency has launched an investigation into Tesla's "Full Self-Driving" system after receiving reports of people crashing in low-visibility conditions.

A federal investigation into Tesla was announced Thursday after one person was injured, and one died after a crash involving a self-driving Tesla.

Driving' appears to struggle in low visibility situations and has led to four crashes, including at least one death. Now it's under investigation.

Tesla's Full Self-Driving system is being investigated in the US after reports it may not function properly when visibility on the road is poor.

The National Highway Traffic Safety Administration said in documents that it opened the probe Thursday after the company reported four crashes when Teslas encountered sun glare, fog and airborne dust.