The Protests in Paris

Yesterday there was a huge demonstration, a big protest, which turned into a riot. And the police and the rioters started clashing with each other in typical fashion. It was happening just a couple of streets away, just a few streets away. I don't think any cars got burned, but it's possible. You could hear like, bang, you know, and the sound of police sirens and bangs and crashes. There were fireworks going off. The police were firing tear gas grenades into the crowd. And the crowd were smashing things and burning dust bins. So what's been going on?