|image grab: aljazeera|
Venezuelan authorities this week arrested more than a dozen people, including Americans who work for the company SilverCorp USA, as part of a bungled incursion that has served as a public relations victory for Maduro's struggling government.
The document deals a blow to the credibility of opposition leader Juan Guaido, who has vehemently denied any links to SilverCorp or involvement in the attempt to remove Maduro by force.
Guaido, the president of the opposition-held National Assembly, argues that Maduro is usurping power after rigging a 2018 election and is recognised by dozens of countries as Venezuela's rightful leader.
The plan described in the 42-page document offers minute tactical details ranging from which landmines to deploy and what riot gear to use, but offers no explanation of how a small group of commandos could overpower hundreds of thousands of security forces who remain loyal to the ruling Socialist Party.
"Service Provider Group will advise and assist Partner Group in Planning and executing an operation to capture/detain/remove Nicolas Maduro (heretoafter "Primary Objective"), remove the current Regime, and install the recognized Venezuelan President Juan Guaido," reads the agreement.
Reuters was unable to immediately confirm the authenticity of the document.
The Washington Post said the general services agreement, signed by Guaido, had been provided by SilverCorp CEO Jordan Goudreau, who has publicly described leading the operation. It said the detailed attachment had been provided by Venezuelan opposition officials.
Guaido's press team did not respond to a request for comment.
Guaido adviser Juan Rendon, whose signature also appears on the document, told CNN that he signed an "exploratory agreement" with SilverCorp but that it was never completed. He said SilverCorp had led a "botched suicide" mission without Guaido's support.
Reuters could not immediately reach Rendon for comment.
The document was also signed by opposition legislator Sergio Vergara and Goudreau.
Reuters was unable to obtain comment from Goudreau, whose voice mail box was not accepting messages on Thursday.
Vergara did not immediately respond to a request for comment.
Two main opposition parties - First Justice and Popular Will, which Guaido is affiliated with - on Thursday said in a statement "the democratic forces do not promote or finance guerrillas, outbreaks of violence or paramilitary groups", and reiterated calls for a transition government.
The logos of six other parties, including Democratic Action and A New Era, which have significant representation in the National Assembly, appear on the document.
Luke Denman, one of the two captured Americans, appeared on Wednesday in a video on Venezuelan state television saying he had been tasked by SilverCorp with controlling Caracas airport to bring in a plane that would fly Maduro to the United States.
He and Airan Berry will be tried in Venezuela's civilian courts, Maduro said.