Massive protests in Brazil against President Rousseff

Over a million Brazilians across the country took to the streets Sunday to protest against President Dilma Rousseff.

Most of those protests, staged by citizens dressed in yellow and green, the main colors of the Brazilian flag, occurred peacefully without violent incidents.

The largest protest took place in Sao Paulo, where police estimated that 1 million people attended. In Brasilia, the capital city, 45,000 people protested, according to official estimates. There were also protests at overseas embassies and consulates in Buenos Aires, London and Sydney.

The protestors were unhappy about the country's struggling economy and a scandal involving oil and gas giant Petrobras.

The country is going through an economic crisis with rising inflation. In addition, the Petrobras bribery and money-laundering scandal has fueled public anger.

The scandal was a blow to Rousseff, who was a Petrobras executive and later served as minister of mines and energy.

Rousseff's denial of any knowledge of the scandal, which reportedly dates back to the 1990s, has failed to convince people. There are calls for her impeachment.

Rousseff was re-elected for a second four-year term in October in the narrowest victory in Brazilian history.