Tens of thousands of people marched in France on Saturday to protest police violence in demonstrations organized by the left, with clashes breaking out on the margins of the Paris rally.

The nationwide protest came just under three months after the point-blank killing by a policeman of a youth outside Paris at a traffic check sparked over a week of rioting in Paris and elsewhere.

In Paris, demonstrators of all ages held up placards proclaiming "Stop state violence", "Don't forgive or forget" or "The law kills", with a statue of justice with its eyes crossed out in red.

The demonstrators took particular aim at article 435-1 of the internal security code, introduced in 2017, which extends the possibility for the forces of law and order to shoot in the event of a suspect's refusal to comply.

The demonstrators were responding to a call by the radical left including the hard-left France Unbowed (LFI).

Unions said some 80,000 people joined the protests across France, including 15,000 in Paris, but the interior ministry put the number at 31,300 nationwide, with 9,000 in Paris.

The government denounced "unacceptable violence" on the margins of the march in Paris, after there were officers trapped in their police vehicle when it was attacked, an AFP correspondent said.

"We see where anti-police hatred leads," Interior Minister Gerald Darmanin wrote on X, formerly Twitter, denouncing "unacceptable violence" against the police.

Paris police chief Laurent Nunez said three people had been arrested over the incident.

Another three were arrested elsewhere in France, according to the interior ministry.

The march came days after the IGPN, the inspectorate responsible for investigating police misconduct, released its annual report on the use of force by officers.

It showed that in 2022, 38 people died as a result police action, including 22 who were shot dead: 13 of those deaths involved cases of someone refusing to comply with a police order.

(With input from AFP)