Tweet reads: "A lot of people at the climate march in Paris".
Police put up barricades there and both vehicles and pedestrians were denied access.
Blue armoured vehicles rumbled across cobblestone streets from the Arc de Triomphe across toward eastern Paris as scattered demonstrations spread around the city.
National police estimated the number of protesters in Paris on Saturday at 8,000, among 31,000 protesters nationwide.
Interior Minister Christopher Castaner said that he expects radical elements to be present in Paris and that "the past three weeks have given birth to a monster that has escaped its creators".
In the Dutch city of Rotterdam, a few hundred protesters in the high-visibility vests walked peacefully across the Erasmus Bridge singing and handing flowers to passers-by.
"The troublemakers can only be effective when they disguise themselves as yellow vests". You can't get housing anymore.
Washington Times opinion editor Charlie Hurt discusses how France suspended the planned fuel tax increases and the U.S.
"Pacific and non-violent march against global warming in Toulouse, we are thousands!" "We want equality, we want to live, not survive", said Guillaume Le Grac, 28, who works in a slaughterhouse in the town of Guingamp in Britanny.
In the video, which was first posted online in June, demonstrators chant "we want Trump" in English as a man in a rubber Trump mask stands on top of a bus.
The grassroots movement began as resistance against a rise in taxes for diesel and gasoline, but quickly expanded to encompass frustration at stagnant incomes and the growing cost of living.
Grace Millane: Disappearance of British backpacker being investigated as murder
Millane called his daughter a "fun-loving, family-oriented daughter" and urged anyone with information to contact police. He also said investigators were looking into her credit card activity to see the last time she made a transaction.
The protesters are angry at Macron and high taxes, among other problems.
Yellow Vests protesters march during their demonstration near the Place de la Bastille.
Protesters, using social media, have billed the weekend as "Act IV" in a dramatic challenge to Macron and his government's policies.
"We had to come to Paris to be heard", said protester Herve Benoit, arriving with three friends from the Dordogne in western France.
Prized Paris monuments and normally bustling shopping meccas were locked down Saturday at the height of the holiday shopping season.
Paris police, fearing that radical protesters could turn street furniture and construction materials into makeshift weapons, on Friday were removing all glass containers, railings and construction machines in high-risk areas.
Tourists were scarce and residents were advised to stay at home if possible.
The operators of landmarks like the Eiffel Tower and the Louvre and Orsay museums said they would be closed, along with operas, theatres, libraries and major department stores.
The Élysée Palace, seat of President Emmanuel Macron, announced to French media they are expecting "great violence" on Saturday as Yellow Vest protestors have announced "Act IV" of their almost four-week-long protest against the Macron regime that was initially sparked by a rise in fuel taxes, franceinfo reports.
But the demonstrations has since swollen into a broad movement against ex-banker Macron, whom the protesters accuse of favouring the rich.
The government had vowed "zero tolerance" for anarchist, far-right or other trouble-makers seeking to wreak further havoc at protests that have sparked the deepest crisis of Macron's presidency.
Four people have died in accidents during the protests and political leaders have appealed for calm.