"There was no driver and no passenger in the car to be able to tell us what happened," San Francisco Fire Department spokesperson Justin Schorr said of the scene.
The urbansphere Concept will help passengers make the most of the time they spend commuting and will offer a number of applications to help them avoid stress.
In a series on Twitter on Tuesday, David Colombo claimed that he had been able to remotely access the vehicles and disable Sentry Mode-a feature that allows Tesla owners to monitor suspicious activities-unlock doors and windows, and start the cars without keys.