The new crash under investigation involves three teens who crashed into a concrete wall in a Tesla Model S earlier this week.
In late March of this year, the NTSB opened another investigation in yet another fatal Tesla crash in Mountain View, California, after a driver crashed into a highway barrier and the auto burst into flames. Meanwhile, the NTSB is investigating a battery fire linked to a Model X that hit a home's garage last August, as well as a crash involving a Model S and a firetruck.
Alexander Berry, who was riding in the backseat at the time of the crash, was ejected from the vehicle but survived.
The NTSB also noted that it does not expect Tesla's semi-autonomous Autopilot system to be a part of the probe. The auto reportedly ejected Berry, but he was injured.
The electric engine of the Tesla burst into flames, with two of the occupants trapped inside. According to the National Fire Protection Association, more than 150,000 gasoline vehicle fires occur in the USA every year. "We are working to establish the facts of the incident and offer our full cooperation to local authorities".
"Our thoughts are with the families and friends affected by this tragedy", Tesla said in a statement.
"We have not yet been able to retrieve the logs from the vehicle, but everything we have seen thus far indicates a very high-speed collision and that Autopilot was not engaged", a Tesla spokesman said in a statement. "The family who owned the vehicle has been a close friend of Tesla for many years", a Tesla representative said in an email to UPI Thursday.
According to the vehicle company, this was a "very high-speed collision and... This doesn't change how devastating an event like this is for our customer's family and friends, and our hearts are with them".
On March 23, a Model X driven by a 38-year-old crashed into a safety barrier on Highway 101 in California, killing the driver and destroying much of the electric SUV.
This is the second time in the past two months the NTSB has investigated a Tesla fire.
The federal agency dismissed rumors that the car's Auto Pilot may be at fault.
The agency said it booted Tesla out of a group investigating the crash after the company prematurely made investigation details public.
Due to the information leak, the NTSB removed Tesla from the investigation; losing party status ended Tesla's ability to share technical assistance with the NTSB.
The crash remains under investigation by the NTSB.