Actor Mary McCormack shared a video of a Tesla car owned by her husband bursting into flames in Los Angeles in the United States on Twitter on Saturday. While McCormack posted on Twitter that the company had not contacted her yet, Tesla’s spokesperson said they were investigating the matter.

McCormack said her husband and British director Michael Morris was driving the vehicle at the time of the incident. “No accident, out of the blue, in traffic on Santa Monica Blvd. Thank you to the kind couple who flagged him down and told him to pull over,” she tweeted on Saturday. “And thank god my three little girls were not in the car with him.” Morris escaped unhurt.

Tesla claims its electric vehicles are 10 times less likely to catch fire than fuel-powered cars. “We offer our support to local authorities and are glad our customer is safe,” ABC News quoted the company’s spokesperson as saying. “This is an extraordinarily unusual occurrence, and we are investigating the incident to find out what happened.”

Los Angeles County Sheriff’s Department Lieutenant Dan Nagelmann told the news channel that the incident was not a result of a collision, but that it may have been triggered by an engine or mechanical error.

McCormack said the car her husband was driving was a model without the autopilot feature.

In May 2016, the driver of its Model S car running on autopilot mode died in an accident.