Riot running rampant

A demonstrator wearing a yellow vest is covered in blood after getting in injured during a protest in Paris on Saturday. (AP Photo/Thibault Camus)

Demonstrators wearing yellow vests march Saturday in Marseille, southern France. (AP Photo/Claude Paris)

Firefighters try to extinguished a car set on fire by demonstrators during clashes with riot police, in Paris on Saturday. (AP Photo/Thibault Camus)

PARIS — The rumble of armored police trucks and the hiss of tear gas filled central Paris on Saturday, as French riot police fought to contain thousands of yellow-vested protesters venting their anger against the government in a movement that has grown more violent by the week.