Violence and fire broke out once in again in Sao Paulo Tuesday (June 18) night as an estimated 50,000 took to the streets in what was, in the beginning, another massive peaceful protest like the one held on Monday (June 17).

Much of the crowd gathered at the Praca da Se square in the centre of Brazil's largest city soon after 5 p.m. local time (2000 GMT) in what was the sixth day of demonstrations to be conducted in South America's largest metropolis.

Crowds soon made their way to the nearby city hall where they continued the demonstration chanting protest slogans and waiving Brazilian flags.

A night after violence broke out in Rio de Janeiro with a handful of protesters setting fire to cars and hurling Molotov cocktails at police, demonstrators in Sao Paulo said they planned to hold a peaceful demonstration.

But police on guard outside city hall got quickly tangled into a scuffle provoked by a small group of demonstrators who later shattered windows and forced police to take refuge inside the building before being called down by other demonstrators.

Sao Paulo mayor Fernando Haddad, a prominent figure in President Dilma Rousseff's left-leaning Workers' Party, said in a meeting with leaders of the protest movement on Tuesday that he is considering a cut in the bus fares that instigated what has now become a protests which have grown in scope.

The backlash over the hike in bus fares has expanded to embrace broader issues with most demonstrators saying the 10 U.S. cents fare increase was just the last straw of a variety of issues.

The growing protests have tapped into widespread frustration with poor public services, police violence and government corruption.

Presented by Adam Justice