SAO PAULO (REUTERS) - Brazil's two biggest cities revoked an increase in public transportation fares, Sao Paulo Governor Geraldo Alckmin and Rio de Janeiro Mayor Eduardo Paes said on Wednesday, following the largest protests seen in the country in 20 years.

Several smaller Brazilian cities have already suspended fare increases.

It is unclear if the fare reductions will appease protesters who have now adopted a variety of causes ranging from corruption to education a year before Brazil hosts the soccer World Cup.