Last month, clashes between rival teenagers erupted in succession, unrelated to each other. “It looks more like a coincidence than a concerted phenomenon, because the latest brawls concern very varied neighborhoods,” says a former deputy commissioner of the 19th arrondissement.

In rue Pavée (4th), on March 4, a young man fleeing was kicked to the ground, then lynched in full view of passers-by by a dozen other hooded people, with knives and hammers.