About 40 people attacked a police station in a suburb of Paris. They used fireworks and metal rods.
They tried to cross the threshold of the office but failed.
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It concerned a police station in Champigny-sur-Marne, southeast of the French capital.
Videos on the internet show how the windows of the desk are smashed and how fireworks are thrown.
The motive for the attack, the third on the agency in two years, is not clear. Nobody was arrested.