The U.S. State Department said on Thursday it expects concerns about the electoral process in Sunday's second-round presidential election in Ecuador to be "fully considered and resolved in a legal and transparent manner".
Lasso, who has largely relied on the disparity between favorable exit polls and the official election results as the basis for his fraud accusations, presented paltry evidence for his case Wednesday challenging 1,795 of the country's 41,042 electoral rolls.
He said Moreno won slightly over 51 per cent of the vote, compared with 49 per cent for opposition challenger Guillermo Lasso, who is contesting the results over allegations of fraud.
The result is "official and irreversible", Juan Poblo Pozo, the head of the election council, said Tuesday in comments broadcast nationwide a day after Latin American presidents including Nicolas Maduro of Venezuela, Juan Manuel Santos of Colombia and Mauricio Macri of Argentina congratulated Moreno on his victory.
Hundreds of Lasso supporters gathered outside the National Electoral Council's headquarters in Quito for the third straight night of mostly peaceful protests that contrasted with the more unruly behaviour seen on election night, when supporters crashed through metal barricades in Quito and scuffled with riot police in several cities.
Mr Lasso has already indicated he will challenge the vote, having earlier alleged fraud.More news: Kyle Lowry returns, Raptors beat Pistons 105-102
Correa accused Lasso supporters of trying to deny the results and provoke violence.
For weeks Ecuadoreans polarised by 10 years of Correa's iron-fisted rule had been bracing for a contested vote.
Ecuador's presidential candidate, Guillermo Lasso, reported that he will request a recount of the second round presidential vote on Sunday, April 2.
Many voters had said they favoured change amid ongoing corruption allegations related to bribes that Brazilian construction giant Odebrecht paid to officials in Correa's government and a $12 million contracting scandal at state-run PetroEcuador.
Moreno, 64, also benefited from last-minute doubts that the pro-business Lasso if elected would gut social programmes that have endeared poor voters to Correa's "Citizens' Revolution".
"I'm going to be the president of everyone but fundamentally those who are poorest", said Moreno.