A group of Brazilian students has organized a demonstration in solidarity with protesters who have faced policy violence in Brazil over the past few days.

The organizers have received permission from the management of Millennium Park to hold the demo at Wrigley Square in the southwest corner of the park (see map here). The conditions are that the participants can hold signs, but they must keep it quiet.

The demo will start at 7 p.m. and may last up to an hour and a half. So you can stop by after work with a sign, but don’t bring any loudspeakers, whistles, or pots and pans to bang on. Similar solidarity protests are planned by Brazilian expatriates in numerous cities across the world.

For those who don’t know, this situation started on June 13, when a protest against a 20-cent public transit fare hike in São Paulo ended in an ugly melee in which police fired tear gas and rubber bullets at the crowd. The protests quickly spread to other major cities and grew into expressions of general discontent with the Rousseff administration, leading to many more claims of brutality at the hands of the police (some well-documented). Brazilian authorities have denied the accusations but vowed to investigate, and they have accused protesters of widespread vandalism.

Here’s a video of the June 13 protest that started it all; it’s in Portuguese but it’s pretty self-explanatory. The ugliness starts at around 2:35.