US Secretary of State Mike Pompeo has said that Venezuelan President Nicolás Maduro's "days are numbered" after deadly clashes over humanitarian aid.
"It's hard to choose exact days. I'm convinced that the Venezuelan people will ensure that Maduro's days are numbered," Pompeo told CNN.
Two people died in Saturday's clash between civilians and troops who were loyal to Maduro, who is blocking relief supplies.
Self-informed interim minister Juan Guaidó said Maduro should resign. ] In pictures: Border clash
hr. Guaidó also urged other nations to consider "all measures" to hold Mr Maduro after opposition-led efforts to bring down aid in the clashes.
Mr. Guaidó met volunteers to collect and transport aid from Brazil and Colombia ̵
US President Donald T rump says he has not ruled out an armed response.
On Sunday, the European Union joined the condemnation.
"We reject the use of irregular armed groups to scare civilians and lawmakers who have mobilized to distribute aid," said EU foreign policy leader Federica Mogherini.
Last month Guaidó told temporary president and has since been recognized by more than 50 countries.
He claims that alleged irregularities with the country's 2018 elections make Mr Maduro's leadership illegal.
Maduro, supported by key economic allies, including Russia, Cuba and China, says he is the legitimate president.
He also warns that deliveries of foreign aid would open the way for US military intervention.
What happened at the border on Saturday?
Under the leadership of Mr Guaidó, Venezuelan opposition had intended to set peaceful auxiliary cars across borders with Brazil and Colombia. Rising inflation has left many Venezuelans unable to afford basic things like food, toiletries and medicine.
Guaidó had promised that the aid would enter the country on Saturday. In response, Mr Maduro partially closed the country's borders with reference to threats to security and sovereignty.
Venezuelan civilians tried to cross to get to the shops of food and medicine, but the trial quickly fell into bloody violence along Venezuela's southern border with Brazil and the western border with Colombia.
- Venezuela crisis – in nine cards
At least two people, including a 14-year-old boy were killed, said human rights groups.
It was also reported that some support stored on the border had been burned. Sir. Pompeo described the reports as "diseases".
"Our deepest sympathy for the families of those who died because of these criminal acts" he wrote on Twitter . "We endorse their demands for justice."
At least 60 soldiers were rejected at the end of Saturday, according to Colombia's migration service, but Most of the military continued to be loyal to Mr Maduro.
Video recordings showed that Venezuelan soldiers crashed their armored vehicles into the border with Colombia to make mistakes.
Another video published on social media appeared to show four soldiers publicly dismissing the president and announcing their support to Guaidó. "We are fathers and sons, we have had enough of so much uncertainty and injustice," said the soldiers.
Mr. Guaidó promised lack of amnesty if they joined the "right side of the story".
About 19:00 local time (23:00 GMT) on Saturday, the Colombian government estimated the number of injured at border crossings to about 300.
On-site reporters reported serious injuries among protesters, including several who seemed to have lost their eyes .
Amnesty International described the use of live ammunition against protesters as a crime in international law.
How has Maduro reacted?
President Maduro has ignored international calls to hold a new election.
He has accused Mr Guaidó of being a "puppet", an "American peasant", a "clown" and an "imperialist beggar".
When protests were on their way to Venezuelan borders, Maduro took a rally in Caracas.
"Take your hands from Venezuela, Donald Trump," he told a strong audience.
The United States is pursuing international efforts to push Mr Maduro and has implemented a number of economic sanctions against his government.
How did we get to this point?
The humanitarian aid stored in Colombia and Brazil is at the center of Maduro and Guaidó, returning to Maduro's re-election in 2018 – a vote that Mr Guaidó declared illegal.
For several years Venezuela has been grabbed by a political and economic crisis. An out-of-control inflation has seen prices rise and many girlfriends are struggling to afford basic things.
Guido insists that citizens need much help while Mr Maduro claims that aid is a trick from the United States to invade the country. At least 2.7 million people have fled Venezuela since 2015.