UN Secretary General Antonio Guterres has offered Colombia more resources to manage a migration crisis that has seen nearly half a million Venezuelans pour into the Andean country.

According to government estimates, Colombia has received more than 470,000 Venezuelans, many of them fleeing chronic shortages of food, medicine and other basic goods amid a major economic downturn.

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"Colombia is suffering the impact of the presence of hundreds of thousands of people leaving Venezuela," Guterres said during a speech in Bogota on Saturday.

Read more: Could there be a Venezuelan refugee crisis?

"I want to express all the support of the United Nations to the government and people of Colombia in this humanitarian effort, the reception of all these people, and say that we are even willing to mobilize other international help as is possible."

'Enormous repercussions'

Colombian President Juan Manuel Santos said the regional crisis fueled by an authoritarian turn in Venezuela "has enormous repercussions" for the region.

Read more: 5 things to understand about oil-rich, cash-poor Venezuela

Colombia and Venezuela have closed their borders several times due to political differences

"[The UN] can bring experience to this humanitarian crisis," said Santos. "Any help will be welcome." The Colombian president also reaffirmed his country's offer to provide humanitarian support to Venezuela, a proposal rejected by Venezuelan President Nicolas Maduro.

Colombia and Venezuela have been at odds since global oil prices tumbled, sending the latter's economy into a nosedive. Maduro has accused Santos of belonging to an international plot aimed at unseating him, an allegation the Colombian presidency has yet to entertain.

Guterres is in Colombia for a two-day visit aimed at reviewing a peace deal between the government and the disarmed Revolutionary Armed Forces of Colombia (FARC) and talks with other armed groups.

Venezuela on the brink The last straw In March 2017, violent protests erupted across the country in response to a Supreme Court decision to strip the legislative branch of its powers. Amid an international outcry, President Nicolas Maduro reversed the decision, but it was too late. Thousands continued to take to the streets, calling for new elections. More than 100 people were killed in clashes with security forces.

Venezuela on the brink Hunger, a growing problem The violence added to the ongoing economic and political crisis in Venezuela. Many Venezuelans spend more than 30 hours a week waiting in lines to shop, and are often confronted with empty shelves when they finally enter a store. President Maduro blames the crisis on US price speculation. The opposition, however, accuses the Socialist government of economic mismanagement.

Venezuela on the brink Health care in crisis The crisis has even affected health care in the oil-rich nation. Venezuelans often head to Colombia to collect medical supplies to send home, as seen in this picture. Hospitals across Venezuela have compared conditions to those seen only in war zones. As patient deaths rise, health officials have sounded the alarm on the rise of malaria and dengue fever.

Venezuela on the brink Power grab By July 2017, Venezuela's pro-government Constituent Assembly was established. For observers, it had all the hallmarks of a power grab. The new body adopted the authority to pass legislation on a range of issues, effectively taking away the powers of Venezuela's elected congress, which was under the opposition's control. The move drew wide international condemnation.

Venezuela on the brink The West sanctions In response to the political crisis, the United States and European Union imposed a series of sanctions against ruling officials. The US blacklisted members of the Constituent Assembly and froze all of Maduro's assets that are subject to US jurisdiction. The EU banned arms sales to the country.

Venezuela on the brink Government victorious in regional elections In October 2017, Venezuela held two votes: regional elections and elections for governors, which were long overdue. The opposition boycotted the vote, but then split, as some candidates and small parties chose to participate. This caused a deep rift within Maduro's opponents. The government went on to sweep the vote, which detractors say was unfair and heavily favored the regime.

Venezuela on the brink Debt default In November 2017, the oil-rich, cash-poor nation faced its day of reckoning. Credit ratings agencies declared Venezuela and its state-run oil company in "selective default." But Russia offered to restructure the South American country's debt to ensure Caracas pays its other creditors. US and EU sanctions, however, limited the chance of an agreement.

Venezuela on the brink Presidential elections scheduled The National Assembly announced in January 2018 that it would grant Maduro's call for snap presidential elections. The electoral authority, CNE, held the elections on May 20. The EU, the US and 14 Latin American nations warned that they would not recognize the results. The mainstream MUD opposition alliance boycotted the vote, leaving only one possible outcome.

Venezuela on the brink Maduro wins ... Maduro was re-elected to a second six-year term with about 68 percent of the vote. Turnout was only 46 percent, according to electoral authorities. However, the MUD opposition alliance put turnout at less than 30 percent. The Organization of American States (OAS) called the elections neither free nor fair.

Venezuela on the brink ... Guaido assumes power But weeks into the new year, the situation took a drastic turn. On January 23, 2019, parliament president Juan Guaido declared himself interim president of Venezuela — a move that was quickly recognized by US President Donald Trump. Maduro called it a US-backed "coup." Days later, the US sanctioned Venezuela's state oil firm, while Guaido staked his claim on the country's foreign assets.



ls/cmk (Reuters, EFE)