Canadian police said on Friday that the previous day in Montreal at the annual protest against police brutality, which evolved into street clashes, 226 were having been arrested and half thousand participants.
The stones thrown by protesters, police responded deafening grenades.
The audience chimed display windows, overturned a police car. On Friday, all the detainees remained in custody and sustained interrogation in order to determine the perpetrators of seven police officers injured in a riot.
"Most of those arrested will be responsible for public law" and minority "has been charged with committing crimes" - said Montreal police spokesman Raphael Bergeron.
Thursday's testimony has been an organized sixteen protest in this city against police brutality.
Montreal police force been a strengthened in 2010 after the creation of a special force to fight against chaos. Since the year continues in the investigation into the death of three homeless immigrants, who - according to some opinion polls - had fallen victim to the brutality of the security forces.