"If anything represents a threat to peace and security, it is the shameless and aggressive actions of the United States and their allies to oust a legitimately elected president of Venezuela", Russian ambassador Vasily Nebenzya said, accusing the USA of an "attempt to engineer a coup d'etat".
As The Hill noted, Pompeo called out China, Russia, Syria, and Iran as countries that took Maduro's side in the conflict. "So I'm not going to justify military intervention because I don't know who's calling for that. I sent many messages to Donald Trump".
Under Maduro, Venezuela has sunk into turmoil with food shortages and daily protests amid an economic and political crisis that has sparked mass emigration and inflation that is seen rising to 10 million percent this year.
Venezuelan President Nicolas Maduro oversaw a display of the army's Russian hardware on Sunday, with anti-aircraft flak and tank rounds pounding a hillside to show military force and loyalty in the face of an worldwide ultimatum to call fresh elections.
Colonel Jose Luis Silva declared himself a supporter of Guaido, saying: "He is the only legitimate president".
A source in Caracas said that Maduro feared that US troops be withdrawn from Afghanistan and Syria, they could be well-suited for redeployment in a Colombia-based conflict with Venezuela.
The top US diplomat rapped China and Russian Federation for "propping up a failed regime in the hopes of recovering billions of dollars in ill-considered investments and assistance made over the years".
Some 29 people have been killed and more than 350 people have been detained in clashes this week between anti-Maduro activists and security forces.
While appearing at the United Nations on Saturday, Secretary of State Mike Pompeo drew a clear line in the sand for member nations that apparently had a hard time deciding who to support in Venezuela.
Canada is a member of the Lima Group, which includes more than a dozen countries who reject the legitimacy of Maduro's election victory in May 2018. "In this world what's respected is the fearless, the courageous, power", Maduro said as the dust settled on the base. "Fear has magnifying eyes".
The first demonstrated in front of the Vancouver Art Gallery on Saturday afternoon, raising signs and holding a banner demanding "U.S./Canada: hands off Venezuela". That set the stage for a showdown at the hilltop U.S. Embassy compound Saturday night, when the deadline was to expire. The US and Cuba had a similar arrangement for decades before the Barack Obama administration restored diplomatic relations with the island nation. He's the best secretary of state we have had since George Shultz.
Venezuelan opposition sympathizers had been urging Guaido to assume the presidency since Maduro was inaugurated for a second term on January 10.
The State Department did not confirm the Venezuelan government's account, reiterating only that its priority remains the safety of its personnel and that it has no plans to close the embassy. "We will continue to evaluate the situation on the ground and determine appropriate action", the official said.