French police have used tear gas on hundreds of protesters who had taken to the streets in Paris to express their resentment at a controversial law proposed by the government

French police have used tear gas on hundreds of protesters who had taken to the streets in Paris to express their resentment at a controversial law proposed by the government.

The rally organized by unions and students came after President Francois Hollande pledged in a radio interview to press ahead with his planned labor market reforms.

The protesters held up signs reading “To disobey, is to think first and then act!” and chanted, “Media are liars, police are fascists.”

The initially peaceful protest turned violent, when some youth protesters threw projectiles, including bricks, toward police and damaged public property, prompting security police to use tear gas against them.

Union leaders lamented the violence, arguing that it spoiled the message behind the protests.

Local media reported that 12 people were arrested in the Paris rallies, nine of whom for carrying munitions and three others for throwing objects.

President Francois Hollande, whose popularity has plunged dramatically a year before the presidential election, has said he would not scrap changes to the labor laws of Europe's third largest economy.

Hollande said 1,000 demonstrators have been arrested and more than 300 police officers injured over the past few months in anti-labor reform protests.

He further claimed that some hooligans from overseas have traveled to France to join the unrest.