Paris police tear-gassed protesters Saturday and arrested 163 people during a day of demonstrations that turned violent after anarchists wearing black infiltrated at least one of the protests.

Three separate protests took place Saturday, with some overlap between at least two of them. One featured Yellow Vest protesters. Another featured about 16,000 climate change protesters, Reuters reported, and the third featured members of a far-left workers union opposed to proposals to lengthen work hours and reduce pensions.

Some Yellow Vest protesters later joined the climate march, which was largely peaceful. But dozens of people dressed in black mixed into the crowd of at least one of the protests and began breaking shop windows, drawing graffiti on buildings and setting fire to trash cans and scooters, The Associated Press reported. Some agitators scuffled with police.

The protests came a day after an estimated four million people in thousands of cities around the world took to the streets for a day of rallies and demonstrations demanding action to combat climate change.