Protesters have been infuriated by the Supreme Court's decisions not to put on trial former presidents Abdala Bucaram, who ruled Ecuador from 1996 to 1997, and Gustavo Noboa, president from 2000 to 2003.
Bucaram had lived in exile in Panama, while Noboa had found refuge in the Dominican Republic.
But the court decision allowed the former leaders, both allies of Gutierrez, to return to Ecuador in early April.
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