Many Sao Paulo residents have been angered by rising public transport prices when inflation in Brazil is already above 10 percent.
More than 1.5 million Brazilians lost their jobs in the year before November, when Latin America’s largest economy plunged into the worst recession in more than 25 years.
The march gathered thousands of people in downtown Sao Paulo and quickly turned into violence as young masked men threw stones at police. There was no immediate information about the detention or the victims.
Police also clashed with protesters in Rio de Janeiro on Friday. Television footage showed masked demonstrators painting buses and smashing their windows.
The scenes sparked protests that engulfed Brazil in 2013, sparked by anger over rising bus fares that brought hundreds of thousands of people to the streets.
https://www.sbs.com.au/news/article/violent-protest-in-brazil-over-bus-fares/ysn3sqgyg