Venezuelan opposition leader Juan Guaidó called for a massive May Day protest to increase the pressure on President Nicolás Maduro after a day of violent clashes on the streets of the capital.
Guaidó said Wednesday's rally would be "the biggest in the history of Venezuela" as he presses his attempt to unseat the president.
"Across all of Venezuela, we will be in the streets," said the National Assembly leader, recognised as interim president by more than 50 countries including Argentina, as he repeated his call for the Armed Forces to join "Operation Freedom" to overthrow the socialist leader.
Maduro however remained defiant after Guaidó's call earlier Tuesday for the military to rise up appeared to have largely failed.
Following a day of clashes between demonstrators and police on the streets of Caracas, Maduro Tuesday evening said he had defeated an attempted coup.
Maduro, who is also due to lead a May Day rally in Caracas, declared victory over the uprising – congratulating the Armed Forces for having "defeated this small group that intended to spread violence through putschist skirmishes."
"This will not go unpunished," Maduro said in an address broadcast on television and radio. "[Prosecutors] will launch criminal prosecutions for the serious crimes that have been committed against the Constitution, the rule of law and the right to peace."
Tensions in Venezuela have been ratcheted up to a critical level this year, after Guaidó announced on January 23 that he was the acting president under the constitution. He said Maduro had been fraudulently re-elected last year.
'No turning back'
Guaido had rallied his supporters with a video message early Tuesday that showed him – for the first time – with armed troops who he said had heeded months of urging to join his campaign to oust Maduro.
Hours after the revolt by military officers appeared to be fizzling out, US Secretary of State Mike Pompeo told CNN he believed Maduro was ready to flee to ally Cuba before he was dissuaded by Russia – a claim Maduro later refuted as "a joke."
Speaking late Tuesday to business executives in Washington, Pompeo voiced hope that Maduro would still choose exile in the coming days.
As UN Secretary General Antonio Guterres appealed to all sides to avoid violence, Venezuela's Army chief and defence minister General Vladimir Padrino López issued a stark warning of possible "bloodshed" – adding that he would hold the opposition responsible.
The US, meanwhile, called on the military to protect the people and support "legitimate institutions" including the opposition-controlled National Assembly.
Trump threatened a "full and complete embargo" and tougher sanctions against Cuba if it does not end military support for Venezuela.