Leaders of the "yellow vest" movement have denounced the police for injuring protesters, but have also struggled to contain violence from their own lines.
One witness who filmed the incident, 21-year-old Cyprien Royer, said the victim was a yellow jacket photographer taking pictures of people trying to break down the barriers protecting the entrance to the National Assembly.
The rallies turned violent, with clashes erupting and police resorting to tear gas to disperse the demonstrators.
About 200 "yellow vests" demonstrators protested in the western French city of Nantes on Saturday, Feb. 9, for what the movement has dubbed "Act 13" of their weekly demonstrations, which have shaken President Emmanuel Macron's authority.
Some of the paramedics served as a barrier to stop media and demonstrators from getting too close.
One protester sustained a hand injury in the scuffles and was treated by emergency workers, police said.
According to figures published by France's interior ministry, there were 12,100 protesters in total, 4,000 of them in Paris. down on the previous week's figures.
Such vehicles have been a common sight in Paris since the deadly attacks by extremists in 2015.
"Every day the military. protects our compatriots from the risk of terrorism. It wasn't pretty: he was screaming with pain, he had no fingers - he didn't have much above the wrist", he said. "These attacks are intolerable", Castaner said.
Yellow vest protesters run away from tear gas fired by riot police as they keep pressure on French President Emmanuel Macron's government, for the 13th straight weekend of demonstrations, during a demonstration in Paris, France, on February 9, 2019.
Many Gilet Jaunes - named after the yellow vests they have symbolically worn - now say they are intent on bringing down Macron's Government.
But a YouGov poll of 1,037 people issued on Thursday suggested that almost two out of three people in France (64 per cent) still support the movement.