President Lenín Moreno has imposed a night curfew near government buildings after protesters clashed with security forces inside Ecuador’s heavily guarded parliament.
Demonstrators briefly burst through a police cordon before being driven back with tear gas, witnesses said.
Mr Moreno declared a state of emergency last week but has failed to end protests led by indigenous groups.
They are demanding an end to austerity and the return of fuel subsidies.
Petrol prices have soared by more than 100% since last Thursday when the subsidies were removed.
The unrest has forced President Lenín Moreno to move the government out of the capital.
Indigenous-led protests have toppled three presidents in the past few decades.
Amid the worst unrest in years, the embattled government has said it is open to mediation through the United Nations or the Roman Catholic Church.