The AP is now reporting that thirteen cars have been torched inside Paris itself (where exactly not specified). Also, “in the Normandy town of Evreux, arsonists burned at least 50 vehicles, part of a shopping center, a post office and two schools.” I’m not familiar with Evreux, but this link does not make it seem like a slum. It has its own Office du Tourisme, but so does practically every place else in France. Still, if this is spreading to middle class areas, I don’t even want to think where it will end.
UPDATE: The four cars were burned in the Third Arrondissement on the Rue Dupuis, hard by the Boulevard du Temple and the Place de la République. That’s central Paris indeed.