In the face of this crisis, the government facilitated the transport of personnel with the help of the Colombian air force, moving urgently to cities such as Cali or Bogota.

In sporting news, Cali won his first match in the South American Cup 1- 0 against the Paraguayan Guarani.

while Cali America in the local tournament lost 1 -3 against seguros equidad. 

Mr Guaidó told the BBC's Leonardo Rocha that the frequent power cuts and water shortages - which have hit hospitals, public transport and other services - were driving intense public anger against Mr Maduro's government.

"We have a situation now with protests in more than 20 districts of the capital, Caracas, and in all Venezuelan states. People are demanding that power and water supplies be restored, but also for the usurper, Nicolás Maduro, to go, which is the main message," he said.The government has claimed the blackouts are the result of sabotage to force Mr Maduro from office.However, Mr Guaidó said Mr Maduro could not be removed unless Venezuela's military switched allegiance.

"The support and the backing of the armed forces will be necessary in order to achieve democratic and peaceful change in Venezuela in all areas, including to protect protesters from the pro-government armed militias," he said.

Mr Guaidó - who the government says will be barred from holding further public office for 15 years - dismissed the recent reported arrival of Russian troops in Venezuela as a "provocation" by Mr Maduro to "try to show some sort of support that he really doesn't have".

"The Russians haven't made any concrete moves. They haven't shown any real support apart from, perhaps, some diplomatic statements," he said.

On Saturday the Red Cross (IFRC) said it could begin distributing aid to Venezuela in two weeks. IFRC head Francesco Rocca said the group could initially help 650,000 suffering from shortages of food and medicine.What's the backgroundMr Maduro narrowly won a presidential election in April 2013 after the death of his mentor, President Hugo Chávez. He was elected to a second term in May 2018 in an election seen as flawed by international observers.

Venezuela has experienced economic collapse - inflation was 800,000% last year. Three million people have left.

Mr Guaidó has accused President Maduro of being unfit for office, and won the support of many in the country as well as US and EU leaders.

The Maduro government is becoming increasingly isolated but Moscow has expanded co-operation with Caracas - increasing arms sales and extending credit.

“Democrats are demanding that the IRS turn over the documents. That is not going to happen, and they know it. This is a political stunt,” Mulvaney said. Democrats countered that Neal’s request to the Treasury Department for Trump’s returns is grounded in law and a needed inquiry, given Trump’s refusal to disclose his tax records and to divest himself of his business interests.

“This is a legitimate authority that the Congress has. This president, by the way, is the least transparent president that we’ve had in half a century,” Democratic Representative Dan Kildee, a tax committee member, told ABC’s “This Week. Democratic Representative Ben Ray Lujan noted that presidents for decades have voluntarily released their income tax returns. “This is not political, as our Republican colleagues are making it out to be,” he told “Fox News Sunday.”

An attorney for Trump on Friday blasted House Democrats’ request for six years of Trump’s personal and business returns as “a misguided attempt” to politicize the tax laws, accusing lawmakers of harassment and interference in IRS audits. In a statement that mapped out the legal battlefield ahead, Trump lawyer William Consovoy said the request filed by Neal flouts “constitutional constraints. Republican Senator Mitt Romney urged Trump to release his tax returns as promised but criticized Democratic efforts to force the issue through legislative action as “moronic.”

“The courts are not going to say that you can compel a person running for office to release their tax returns,” he said on NBC’s “Meet the Press. One of many investigations targeting Trump on Capitol Hill and in the U.S. court system, the House Democrats’ probe into the president’s tax returns could pull back the curtain on his business empire and his reputation as a dealmaker. As a presidential candidate in 2016, Trump broke with a decades-old practice of making his tax returns public and continues to refuse to release them as president, while retaining ownership in many enterprises, ranging from golf courses and hotels and other properties.

If Congress takes the administration to court over Trump’s taxes then little case law would be available to help guide judges, legal experts said, both because the statute cited by Neal to obtain the returns has hardly ever been contested, and because most document disputes between the legislative and executive branches of government are resolved by negotiation.

The losing party could appeal, ultimately to the U.S. Supreme Court. If litigation extends into 2021, a judge could also force a newly elected Congress to start the process over, said Ross Garber, an attorney who specializes in political investigations.