Tesla shares slipped 2% in Wednesday´s trading session amid reports that investigators were probing a crash on a Californian motorway that could be linked to its self-driving technology.
Two federal agencies have sent teams to gather information on the crash in California involving a Tesla Model S electric car that may have been driving through the company´s Autopilot system.
Tesla´s Autopilot system is a semi-autonomous driving system that keeps the car centred in its lane at a pre-determined distance from other cars.
Autopilot also allows Tesla vehicles to change lanes and brake autonomously.
Tesla´s share price is especially sensitive to developments concerning its self-driving technology.
In the crash on Monday, the Tesla Model S drove into the back of a fire engine that was parked just off the main highway as it was attending to a crash on the other side of the motorway.
Investigators from the National Transportation Safety Board (NTSB) and the National Highway Traffic Safety Administration were sent to the area of the crash on Wednesday, in Culver City, California.
The driver of the Tesla car involved in the latest incident has already told police that the vehicle was on Autopilot at the time of the crash.
In September, the NTSB pointed to design limitations in the Tesla Model S Autopilot system as a factor in a fatal crash that took place in May, 2016.
However, the agency also said human shortcomings were to blame.
“Amazingly there were no injuries! Please stay alert while driving,” the union for Culver City firefighters said in a tweet.
In a statement, Tesla emphasised that the Autopilot system was “intended for use only with a fully attentive driver.”