Riot police fired tear gas and water cannon at protesters marching on Thursday in France against labor reforms in what unions say will likely be the last demonstrations to try to overturn the law.
Scuffles broke out in cities including Paris, Nantes, Toulouse, Rennes, Grenoble and Montpellier, the Interior Ministry said in a statement.
Hooded youths hurled bottles, beer cans and on occasion makeshift firebombs on the fringes of marches against the law that will make hiring and firing easier.
As turnout fades after six months of protests, the head of the Force Ouvriere union signaled that the focus of opposition would now shift to legal challenges against the application of the new law, and that street marches were at an end.
"We are lifting our foot off the pedal for now. We are not going to do this every week," Jean-Claude Mailly told reporters at a rally in Paris's Place de la Bastille square.
Seven months from a presidential election, Mailly said that the unions would not let Socialist President Francois Hollande and his government off the hook.