Hundreds of taxi drivers waving flags and shouting angrily marched through central Paris Thursday in a third day of protests against rival services such as Uber.

The demonstrators were prevented from reaching the Champs Elysees by a police roadblock. Some swarmed around taxis that weren't participating in the strike, yelling at the drivers and kicking their cars.

Traditional taxi drivers say they're suffering unfair competition from app-based Uber, which has faced legal challenges around Europe. Uber argues the sector needs to catch up with the times.