Maduro, for his part, stood defiant, accusing the United States of preparing a coup in the South American country and rejecting a US -backed effort to send emergency food and medicine into his country.
The United States, Canada and several Latin American countries have disavowed Maduro over his disputed re-election a year ago and recognized self-proclaimed President Juan Guaido as the country's rightful leader.
Sweden, Denmark, Austria, the Netherlands, Lithuania, Finland, Estonia, Latvia, the Czech Republic, Luxembourg, Poland and Portugal also lined up behind Guaido, who last month declared himself interim president with the support of the United States and many South American nations.
He has said he is only willing to call new elections to the opposition-held National Assembly.
Spanish Prime Minister Pedro Sanchez was another leading political figure to endorse Guaido as interim president, while also urging him to call an election in the near future.
Sanchez said he wanted Spain to spearhead a plan of humanitarian aid for Venezuela in the European Union and United Nations. Critics of Maduro blame the Venezuelan government's mismanagement for the lack of food and medical supplies.
A spokesman for Prime Minister Theresa May said the United Kingdom was looking at options to help expedite peace and democracy in Venezuela, including the use of sanctions.
French Foreign Minister Jean-Yves Le Drian, speaking to France Inter Radio, appealed for an early presidential election that will ensure "the Venezuelan crisis ends peacefully".
The Venezuelan leader, accused of running the OPEC nation of 30 million people like a dictatorship and wrecking its economy, has defied them and said European rulers are sycophantically following President Donald Trump.
Guaido says up to 300,000 people are "at risk of death" in Venezuela for want of humanitarian assistance.
Nigerian VP Yemi Osinbajo thanks crew after helicopter crash
He was in the area council to attend the graduation of 40 senior officers of the Nigeria Customs Service. Meanwhile, Nigerians are expected to go the General Election on February 16, 2019.
Sean McVay, Bill Belichick meet ahead of Super Bowl 53
They made two other Super Bowl appearances, both losing efforts, including a 2002 loss to the Patriots. In fact, McVay recently said that Belichick texted him after just about every game this season.
Seagate's officially licensed PS4 game drive adds 2TB storage
Before we tackle that, though, what of these two unannounced titles for PS4? Both Vita games are cross-buy with PS4. However, he's "conscious that there have been discussions around making them cross-gen/next-gen titles".
On Monday, Guaido said the European Union needed "to act in unison so that the forces, who are still supporting Maduro feel all the weight of Europe's diplomatic and political pressure".
"I don't accept ultimatums from anybody", Maduro told Spanish TV channel La Sexta in an interview broadcast late Sunday.
Any move to significantly revamp the voting rules on foreign policy would be hugely controversial in countries such as Italy and Greece, which have repeatedly blocked EU-wide initiatives in this area.
The embattled president on Sunday promised peace for Venezuela without specifically responding to Trump.
In an interview that aired Monday with Italy's Sky TG24 he said that he had written Pope Francis asking for help in fostering dialogue with the opposition. "I hope to receive a positive response", he said.
Such intervention "does not contribute in any way to a peaceful, effective and vital settlement to the crisis that Venezuelans are enduring", Kremlin spokesman Dmitry Peskov said in comments carried by state news agency TASS.
Spain's Prime Minister Pedro Sanchez steps out of the Moncloa Palace in Madrid, Spain, September 12, 2018. A growing list of 38 countries has now recognized Guaido, including non-EU European nations Kosovo, Iceland and Albania. It aims to address the crisis in Venezuela and is due to hold its first meeting in Uruguay on Thursday.
Russia, one of the main allies of Maduro's regime, slammed what it dubbed European "interference" in the oil-rich but impoverished Latin American country, saying it was an attempt "to legitimise usurped power".
The gathering of more than a dozen of Canada's Western Hemisphere allies is meant to find new ways to support Venezuela's opposition and ease the refugee crisis.