After protests last week  turned violent, French authorities have detained two executives of the ride-sharing company Uber, although officials stated that they were brought into custody on charges unrelated to the protests. Uber is facing ferocious criticism in France, with taxi-drivers complaining that drivers for UberPOP don't have professional licenses and don't pay the same taxes as traditional car services. The conflict highlights tensions in France, a country with a long tradition of hard-fought labor rights, as it grapples with new technologies and economic models.

Uber France CEO Thibaud Simphal and Uber Europe GM Pierre-Dimitri Gore-Coty  were both taken into custody today in Paris. The AFP  first broke the news. The police started investigating Uber in November 2014 and raided its office in Paris in March 2015.

The two executives were charged with two different allegations. First, according to them, Uber is running illegal taxi operations. Uber has been struggling with this charge in many countries, starting with the U.S. In 2010, the company had to change its original name from UberCab to Uber as taxi companies didn’t want to create any confusion.

Second, the police said that Uber France is concealing digital documents. It’s hard to tell what the police was looking for when they raided the French office in March. But apparently, some documents are missing and slowing down the investigation.

The transportation company executives weren’t taken into custody because of the violent protests that occurred last Thursday — taxi drivers want Uber to stop its cheapest service, UberPOP. But it’s hard to rule out a link between the two events. The police might have sped up its investigation following last week’s incidents. Cabbies damaged 70 cars — some of them were even flipped over and burnt.