AUBERVILLIERS, France - Widespread riots across impoverished areas of France took a malevolent turn in a ninth night of violence, with youths torching an ambulance and stoning medical workers coming to the aid of a sick person. Authorities arrested more than 250 people, an unprecedented sweep since the beginning of the unrest. Bands of youths also burned a nursery school, warehouses and nearly 900 cars overnight as the violence spread from the restive Paris suburbs to towns around France. The U.S. warned Americans against taking trains to the airport through the affected areas.
 

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