Please see both stories:
Police face protesters in Nantes as ‘yellow vest’ marches resume
Reuters
NANTES — Hundreds of demonstrators faced police in a tense stand-off in the French city of Nantes on Saturday as revived “yellow vest†protests against the government of President Emmanuel Macron took place across the country.
Police responded with tear gas after some protesters threw projectiles. A spokesman with the local prefecture said 21 people had been arrested.
Television footage showed groups of black-clad protesters trying to break into shops, while police trucks carrying water cannon were seen arriving on scene.
Read more at: https://nationalpost.com/pmn/news-pmn/politics-news-pmn/police-face-protesters-in-nantes-as-yellow-vest-marches-resume
I wonder what the last sentence above means, "black-clad protesters trying to break into shops", that sounds like the anarchists not the yellow vests (who all in all, seem to be more conservative, kind of like the tea party?)
Yellow Vest Protesters Take to Streets of Nantes, Paris for New Rallies (+Video)
TEHRAN (Tasnim) – ‘Yellow Vest’ protesters took to the streets in Paris and Nantes for a new round of demonstrations.
September, 14, 2019
Yellow Vest demonstrators are flooding the streets of the capital Paris as well as Nantes in western France on September 14 to take part in a new round of rallies. This time the organizers have moved the demonstration from traditional protest areas to other areas of the city.
Read more at: https://www.tasnimnews.com/en/news/2019/09/14/2096076/yellow-vest-protesters-take-to-streets-of-nantes-paris-for-new-rallies-video (video)
Tasnim is Iranian news but honestly, this story came up in a search, I think Nantes in the North of the country in or near the Normany area has been reported to have quite a few protests this day.