I saw this story a while back, it is basically one or maybe two banlieues in Paris.
David Ignatius in The New York Times wrote about France, "Arab gangs regularly vandalize synagogues here, the North African suburbs have become no-go zones at night, and the French continue to shrug their shoulders."
La Courneuve, a municipality (commune) in the Paris region, was described by police as a no-go zone.
In 2010, French newspaper Le Figaro called certain neighborhoods of the southern city Perpignan "veritable lawless zones", saying they had become too dangerous to travel in at night. They added that the same was true in parts of Béziers and Nîmes.
In 2012, the mayor of the French city Amiens, in the wake of several riots, called the northern part of his city a lawless zone, where one could no longer order a pizza or call for a doctor.
In 2014, Fabrice Balanche, a scholar of the Middle East, labelled the northern city of Roubaix, as well as parts of Marseilles, "mini-Islamic states", saying that the authority of the state is completely absent there.
American magazines Newsweek and The New Republic have also used the term to describe parts of France.
In January 2015, after the Charlie Hebdo shooting in Paris, various American media, including CNN, described the existence of no-go zones across Europe and in France in particular. In some cases, the French areas termed "sensitive urban zones" were described as no-go zones.
https://en.wikipedia.org/wiki/No-go_area#France