"Washington is basically ready to declare the leadership of Venezuela "a sponsor of international terrorism" and use force or sanctions against Caracas based on this," Kostyukov said.
READ MORE: Venezuela's Interior Minister Says Detained Guaido Aide Part of Terrorist Cell
"Washington calculated wrong in its estimates of how resilient the legitimate government was and how much Venezuelan security forces were prepared to defend the leadership," he said.
Kostyukov added that UK banks were refusing to give Venezuela back 80 tonnes of its gold.
Earlier, Venezuela President Nicolas Maduro has accused the United States of trying to orchestrate a coup in order to install Guaido as a "US puppet" so that Washington can take control of Venezuela's oil resources.