Another Tesla collision is being investigated by the US government’s car safety agency, this time in Florida where two people were killed.

National Highway Traffic Safety Administration investigators have arrived at the scene of a semi-trailer accident near Gainesville, Florida, on Friday to conduct an investigation into the cause of the crash.

The NHTSA refused to reveal if the Tesla was using one of the company’s partly autonomous driving technologies.

In the parking lot, it struck the rear of a parked tractor-trailer, according to a statement from the Florida Highway Patrol.

The deaths were confirmed at the site of the accident in Lompoc, California.

Tesla is yet to respond to a request for comment.

National Highway Traffic Safety Administration investigators

There have been 37 accidents involving autonomous vehicles under investigation by the NHTSA since 2016. At least 15 individuals have died in 11 fatal collisions involving Teslas, with 30 of them occurring in Teslas.

There were over 400 incidents with partly automated driver-assist system cars, including 273 involving Teslas, according to statistics provided in June by the National Highway Traffic Safety Administration (NHTSA).

Traffic Aware Cruise Control , Autopilot, Full Self-Driving, or other driver-assist technologies that have control over steering and speed have all been involved in Tesla’s incidents. About 830,000 of the company’s cars are equipped with the technology.

Of the twelve manufacturers that had accidents, Honda came in second with 90. According to Honda, there are around 6 million cars equipped with this technology now on U.S. roadways.

Since Tesla’s cars are monitored by telematics and get real-time incident data, the company’s crash statistics may look higher. As a result, NHTSA warns that other manufacturers may not be able to submit incidents in a timely manner or may not even report any collisions at all. Self-driving and Driver-assist systems have the potential to save lives, but only if the National Highway Traffic Safety Administration establishes baseline performance criteria and enforces safety upgrades to safeguard all road users.