The political crisis escalated significantly Thursday when the chief of staff, Roberto Marrero, a lawyer and confidant of Guaidó, was taken from his apartment in southern Caracas around dawn to an unknown destination by armed intelligence officers,
Guaido invoked the constitution in January to assume the interim presidency after declaring Maduro's 2018 re-election a fraud, and has been recognized by dozens of Western nations as the country's legitimate leader.
Guaido on Sunday tweeted that Venezuelans should monitor his official announcements and that he would provide details about meeting points for supporters. He said they should gather across the country at 11 am.
Guaido has spent the past few days touring between Latin American countries to muster support for his campaign to form a transition government and oust President Nicolas Maduro, whom he denounces as an illegitimate usurper.