Thousands of teachers and civil servants protested in front of Sao Paulo's city hall on Tuesday, as their strike against a controversial social security reform project continue.

Municipal teachers have been striking since March 8 against a social security reform project proposed by Sao Paulo prefect Joao Doria, which would entail a raise of civil servant taxes from 11 to at least 14 percent.

The bill was approved by the Chamber's Constitution and Justice Commission last Wednesday.