France's top security official says Uber is facing multiple investigations as its low-cost taxi service inflames tensions around the country.

Interior Minister Bernard Cazeneuve spoke Friday to RTL radio a day after striking taxi drivers threw travel plans across the country into chaos, attacking Uber livery cars and setting fire to tires on a major artery around Paris.

Cazeneuve banned UberPop in the Paris region. It is already banned elsewhere in France, but Uber officials insisted they would continue their activities until France's highest court rules on the service — an attitude Cazeneuve called "cynical and arrogant."

Furious taxi drivers say the low-cost UberPop service is ruining their livelihood. Uber drivers have been repeatedly ambushed, sometimes with customers inside.