A Tesla Model S travelling on the Pacific Coast Highway in Newport Beach, California, struck a curb and collided with construction equipment, killing the three people in the car and injuring three construction workers.

The National Highway Traffic Safety Administration (NHTSA) said it would investigate the crash, including whether Tesla’s AutoPilot driver-assist technology was active.

The injuries to the construction workers were considered non-life-threatening and they were taken to a local hospital.

35 of the 42 open investigations being conducted by the NHTSA’s in-depth crash investigation team related to driver-assist technology involve Tesla.