Venezuela's Guaido to meet Bolsonaro in Brazil
Guaido, recognized as interim president by 50 countries, will travel to the Brazilian capital from Colombia, where he has stayed since Friday despite a travel ban imposed on him by the regime of Venezuela's socialist leader Nicolas Maduro.
Brazil and Colombia are Guaido allies that have been holding humanitarian aid the National Assembly speaker wants to bring into Venezuela.
He failed to do that over the weekend as a military blockade ordered by Maduro held firm.
The Guaido camp source said he had not yet decided if he will visit the border area with Venezuela where four people were killed over the weekend in clashes with Maduro's security services.
Guaido met US Vice President Mike Pence at a Lima Group meeting with regional allies in Bogota on Monday, after which he said he would return home this week, despite having received threats.
"A prisoner is no use to anyone. Neither is a president in exile," Guaido told NTN24 television channel on Tuesday.
"My role and my duty is to be in Caracas, despite the risks and regardless of what that implies."
Maduro told ABC News in the United States that Guaido would have to face justice when he returns as he flouted a ban on foreign travel.
Guaido has dismissed Maduro's authority as illegitimate over his controversial re-election in May in polls boycotted by the opposition as many of their leaders were unable to stand due to imprisonment, exile or being barred.
Venezuela has been struck by a humanitarian crisis that has left millions in poverty and chronic shortages of basic necessities such as food and medication.