The US National Highway Traffic Safety Administration said on Wednesday it is sending a team to investigate a fatal Tesla crash and fire in California last week, a spokeswoman for the auto safety regulator said on Wednesday.
The National Transportation Safety Board said Tuesday it had sent a team to investigate the crash near Mountain View, California that led to the death of a Tesla driver.
The two federal agencies in January sent teams to review a Tesla crash but has not released any findings.
Tesla did not offer a comment on the NHTSA probe, but said Tuesday in a blog post that it did not know the cause of the March 23 crash and had offered assistance to investigators.
NTSB also said Tuesday it was "unclear if automated control system was active at time of crash."