It was at one o'clock in the morning that the police and rescue service were called to Råslätt due to a car fire.
The car was overheated and there was no risk of spreading to other cars.
Another car nearby had been damaged.
In recent days, many cars have been set on fire around Sweden, in connection with Rasmus Paludan, party leader of the Danish right-wing extremist party Stram Kurs, holding demonstrations.
He visited Råslätt on Thursday and then burned a Koran.
The police do not know if the night's car fire has any connection to it.
- It may be so, it may be so, but it does not have to be so.
We do not know who did this and what the motives are for it, says Johnny Gustavsson, spokesman for the police region East.