It was at 06 o'clock on Friday morning that the rescue service was alerted to the accident.
The car, where four people were traveling, must have driven off the road, overturned and been left on the roof.
A man was taken by ambulance to Ryhov with serious injuries.
The police have initiated a preliminary investigation regarding gross negligence in traffic against the driver, a man in his 20s.
The car has been seized for a technical inspection.