Caracas is demanding access to funds blocked abroad due to sanctions against Maduro, to buy more doses from the global Covax vaccine-sharing mechanism.
Morales on Monday signaled his intention to return to Bolivia.
There are hundreds of families living in state-supplied shelters in crisis-wracked Venezuela.
The mission reviewed some 2,500 incidents since 2014 that led to more than 5,000 killings by security forces.
Authorities had registered 537 deaths and 20,081 cases across Latin America by Wednesday afternoon.
In January this year, Venezuela's opposition chief Juan Guaido declared himself interim president.
The cryptocurrency could help the country escape international regulations and sanctions.
The prevailing uncertainty in the oil market abetted by OPEC production cuts, the U.S. sanctions on Venezuela oil and other factors can snowball into an energy crunch and impact oil price, warned an industry expert.
Trump alarmed friends and foes alike with talk of a "military option" to remove left-wing President Nicolas Maduro.
Venezuelan prisoner are reportedly eating rodents to avoid starvation. One prison was taken to hospital last week after eating dead rat
The opposition Democratic Unity alliance said the elections will not be free and fair.
Eagle-eyed users of Reddit's r/Bitcoin community expose scammer attempting to defraud members out of cryptocurrency.
Maduro's socialist-backed Constituent Assembly calls for snap polls in April 2018 allowing Maduro to cement power against a fragmented opposition.
While the dramatic gun battle was going on around him, Perez – who had been an action film star and portrayed himself as a James Bond or Rambo-like figure on social media – posted several videos on Instagram.
Supermarket shelves and fridges are empty, and the prices of the few goods that are available can change every day.
As Venezuela's national currency loses value at a catastrophic rate, thousands of ordinary but desperate people turn to the world of cryptocurrency.
President Nicolas Maduro says move designed to by-pass financial sanctions slapped on Caracas.
Dramatic images of police and soldiers cracking down on young protesters were broadcast around the world, but less is known about the thousands more who were hauled away.
Move is designed to ramp up pressure on President Nicolas Maduro over corruption and abuse of power allegations.
The new measures come into force on 18 October.