Paris police have used tear gas and water cannon to keep at bay protesters demonstrating for a second weekend against rising fuel prices.
Clashes broke out on the Champs-Elysées as protesters tried to penetrate a police security cordon around sensitive sites in the centre of the city.
Demonstrators on the Champs-Elysées came up against metal barriers and a police-enforced perimeter designed to stop them from reaching key buildings such as the prime minister's official house.
The authorities say that so far there is no sign the demonstrators have been able to enter unauthorized areas.
At a news conference on Saturday, French Interior Minister Christophe Castaner blamed the clashes on far-right extremists merging with the demonstrators.
104Their freedom of expression will be guaranteed