According to Wrecked Exotics, the BMW caught on fire first but by the time the truck driver found out about the fire—he was alerted by a passing driver—the other cars on board had succumbed to the flames. Fortunately nobody was injured.
This photo shows the wreckage of the cars at an auction site in Bangkok, Thailand. It’s likely some parts will be salvageable but the cars are all write-offs.
Sadly, just a couple of weeks ago a Rolls-Royce Wraith being transported on a truck was also destroyed by fire.