Thousands gather in support of imprisoned former Brazilian president Lula da Silva

Thousands of protesters gather in São Paulo to mark the one year anniversary of former President Luiz Inácio Lula da Silva's arrest.

Many of the former president's supporters can be seen chanting and wearing clothing with the phrase "Lula Livre (Free Lula)."

Lula da Silva is serving a 12-year prison sentence on corruption charges.

This footage was captured on April 7.