Driving" system is under scrutiny after reports of crashes during low-visibility and the death of a pedestrian.

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 opened a federal investigation into whether Tesla Inc.’s partial-automation system marketed as Full Self-Driving is defective after multiple crashes, one of which resulted in a fatality.