UK travellers to Brazil continue to be advised to avoid all protests and demonstrations as unrest spread yesterday to about 100 cities.
Protests have also been held around stadiums hosting Confederation Cup football matches.
The Foreign & Commonwealth Office said: “Monitor local media, follow the guidance of local authorities and expect some disruption to travel.”
Local reports estimated that more than one million people took part in demonstrations yesterday – the latest in an escalating week-long wave of anti-government rallies.
Protests were sparked by plans to hike public transport fares – a decision now reversed.
But demonstrators are angry at corruption and poor public services as well as the huge cost of next year’s football World Cup, saying the government should also invest in education and healthcare, according to the BBC.