Uber's Paris office has been raided by the French police this week as part of a probe into its controversial UberPop service.
According to The Verge, 25 cops raided Uber's headquarters for six hours on Monday, seizing emails, documents, and smartphones used by Uber drivers.
The company's low-cost UberPop service came under scrutiny in France after authorities deemed it illegal under a new law that took effect on January 1.
The regulation requires all taxi drivers to be licensed and insured- requirements, which the French authorities suspect, UberPop does not meet.
Uber has maintained that the service is legal under French law and has filed appeals with the European Commission.
The taxi-hailing service described the raid as an "attempt at intimidation" on part of the French government. A statement released by the company said that it planned to "vigorously defend the rights conferred upon it by EU law and the French Constitution."
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Thibaud Simphal, Uber France's general manager said that the firm viewed the raid as a "disproportionate action, carried out on shaky legal grounds."
UberPop, which connects clients with non-professional drivers, remains available in France; although about 250 chauffeurs have been fined since the beginning of the year.