At least 288 people have been arrested and some 100 others injured as protesters took to the streets of Paris against rising fuel prices, clashing with riot police, authorities said.
A police spokesman told CNN that clashes erupted on Saturday after the protesters from the "gilets jaune" or "yellow vest" movement demonstrated against rising gas prices and taxes on polluting forms of transport.
Saturday's protests marked the third consecutive week of such demonstrations, although with an estimated 36,500 participants across the country they were smaller than those in weeks past, according to the French Interior Ministry.
Last week, about 53,000 participated and there were about 113,000 the week before.
"All the police, the gendarmes and civil security forces were mobilised," Interior Minister Christophe Castaner said, adding that 65,000 agents had been deployed around the country and 4,000 in Paris, a number that proved insufficient to deal with the 3,000 violent protesters identified by the authorities.
The arch was spattered with yellow paint saying, "The 'yellow vests' will triumph" and later a group of demonstrators managed to get access to the top of the monument.
"The Tomb of the Unknown Soldier encircled, the Arc de Triomphe daubed," he added.
As the day wore on, the area surrounding the Champs Elysees began to look like a war zone, with protesters launching Molotov cocktails and cobblestones at police who responded with tear gas and water cannon.
The violent protests and vandalism in Paris have "absolutely nothing to do with the peaceful demonstrations of a legitimate unhappiness or discontent", Macron told the media on Saturday in Buenos Aires, where he's attending the G20 summit.
Those responsible will be identified and taken to court, he added.
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