First Paris, then Sao Paolo, then Guangzhou, then Rio de Janeiro. Now Mexico City is the latest hotbed of anti-Uber protests.

Protests against the transportation giant have popped up in cities across the globe this summer. Mexico City has seen weeks of ongoing anti-Uber protests, with cab drivers demanding a complete halt of the app-based car service, questioning its legality and claiming unfair competition.

This week, the demonstrations briefly turned violent.

Several clips have emerged showing drivers assaulting Uber vehicles with rocks and clubs. Footage of this week’s protest showed throngs of cab drivers, flanked by supporters, vandalizing vehicles near Mexico City International Airport.

Via Vice:

The city has one of the largest cab fleets in the world — a figure perhaps as high as 140,000. That means they have a lot of upset drivers crying foul. Like the French and Brazilian protests, the drivers in Mexico say their livelihoods are threatened by unfair competition.

Cab drivers in Mexico City have vowed to continue protesting.

Meanwhile, other demonstrations in Costa Rica and Colombia, as well as legal action in the U.K., mean that Uber has a bumpy road before it’s welcome across the globe.