Violence among the protesters?

Last night, while Rose and I were eating dinner, we looked out the window to see some cops and a group of about 80 people that seemed to be "against" something. Everyone in that whole end of the restaurant was looking at them. Then one of them pulled out a sign that said something about being against the Formula One weekend and against capitalism. They began walking down the street peacefully.

We walked around the neighbourhood a little, if you can call downtown a "neighbourhood" as such, and stopped by to talk to procrasto for a few minutes. (Rose thinks you're a pretty nice guy, by the way.) We got into the metro on the orange line. I didn't notice at first, but there was commotion at this station. We ended up stopped there for a while. People were screaming in excitement. I didn't pay it much heed; I figured that they were a bunch of revelers enjoying the Formula One weekend. But after about five minutes of waiting at the station, I decided to poke my head out.

It was chaos. There must have been about 10 cops and 50 of the people we saw at the restaurant fighting. The cops had their batons out, and I saw about five or six people getting hammered with it. It was a scene from the news in one of those unfortunate fucked-up countries that we only hear about, like Rwanda, or the United States. I think a good number of them escaped, into the metro system, though, as at the next station we saw a large number of similar people (white, wearing mostly black, young, hippie protester-like) getting off at the next station.

If any of you locals heard anything about a bunch of yahoos getting their asses handed to them by the cops yesterday, drop me a line here. I'd like to know what happened, and if these are the same people that we saw at the restaurant.