Billionaire Elon Musk saw his net worth fall on Monday, as shares of his electric car company dropped following reports that two people died in a fatal Tesla crash over the weekend.
Shares of Tesla were down 3.8% as of 3:45 p.m. EST on Monday, shaving $5.6 billion off Musk’s fortune. He’s now worth $174.1 billion, according to Forbes estimates. The Tesla CEO and cofounder is the third-richest person in the world—behind Amazon CEO Jeff Bezos, who has a net worth of $195.9 billion, and French luxury goods tycoon Bernard Arnault, who is worth $180.3 billion.
Tesla’s stock fell on Monday amid reports that two men died after their 2019 Tesla Model S crashed into a tree north of Houston on Saturday night. Local authorities said that they believed the vehicle was operating without anyone in the driver’s seat—with one of the men reportedly in the front passenger’s seat and the other in the back seat of the Tesla. The vehicle was traveling at high speeds along a curve before veering off the road and bursting into flames at around 11:25 p.m., police said.
The crash also raises further questions about Tesla’s Autopilot feature. Authorities were not yet certain if Autopilot was active during the crash which killed the two men, aged 59 and 69, respectively. Nonetheless, the company’s semiautomated driving system has faced mounting scrutiny following a series of accidents involving Tesla vehicles in recent months. The National Highway Traffic Safety Administration said last month that it had launched more than two dozen investigations into crashes of Tesla vehicles, and on Monday said that it would also be investigating the most recent crash north of Houston.
Tesla, which does not have a media relations department, does not appear to have issued any statements in the wake of the accident. Both the company and its billionaire CEO, however, have repeatedly touted the safety of Tesla vehicles and the Autopilot feature. Musk, who is active on Twitter with nearly 52 million followers, posted on Saturday afternoon prior to the accident that a Tesla with Autopilot engaged is nearly ten times less likely to be involved in an accident than an average car.
Update 6:45 pm EST, April 19: Later on Monday, Musk posted on Twitter denying that Tesla’s Autopilot feature was involved in the crash. Data logs recovered from the accident “show Autopilot was not enabled” and that the car did not purchase Full Self-Driving (FSD), the Tesla CEO said in his tweet. “Moreover, standard Autopilot would require lane lines to turn on, which this street did not have,” Musk wrote.
This article originally appeared on Forbes.