Hundreds of thousands of workers have taken take part in strike action across France on Thursday, after trade unions called for a day of protests against budget cuts, reports BBC News.
Organisers said one million people turned out, while the interior ministry put that number at 500,000, with 80,000 police officers deployed.
Scuffles were reported in the cities of Lyon and Nantes, and in Paris small-scale clashes broke out between police and protesters.
Officers in riot gear used tear gas and shields to disperse crowds in the centre of the capital after some protesters damaged a small number of businesses and buildings.
The strikes come barely a week after Sébastien Lecornu, a close ally of President Emmanuel Macron, was appointed prime minister following the toppling of François Bayrou's government.
Public transport was heavily disrupted on Thursday, with many metro lines in Paris reported shut, while protesters blocked roads and streets in major cities across France.
Students gathered in front of schools and universities in the capital and beyond, blocking entrances and chanting slogans. Around a third of teachers walked out.
Pharmacists are also adhering to strike action in droves, with 98% of pharmacies expected to stay closed.
More than 140 people were detained across France by late afternoon, the interior ministry said.
Unions have called for more spending on public services, higher taxes on the wealthy and for the budget cuts outlined by the short-lived Bayrou government to be axed.
Cyrielle, a 36-year-old IT worker, told the BBC she was striking because "Macron's economic and social policies don't suit me, nor did Bayrou's budget". She was taking part in a tightly-policed, large demonstration in central Paris.
"I would like more resources invested in public services and culture. Perhaps a percentage of people with enormous wealth could contribute a little more," she said, adding that if the new government "leaned more to the left, that would be the beginning of a solution."
Sophie Binet, the leader of one of France's major trade union groups, the General Confederation of Labour (CGT), said: "We need to be out in force, that's how we gather strength to keep fighting... to force the government and the employers to put an end to policies that only serve the richest."
Read more of this report from BBC News.