The U.S. is 'in active pursuit' of an oil tanker after President Donald Trump announced a total blockade of Venezuela's oil exports.

The U.S. Coast Guard over the weekend was “in active pursuit of a sanctioned dark fleet vessel that is part of Venezuela’s illegal sanctions evasion,” an official told ABC News. “It is flying a false flag and under a judicial seizure order,” the official said at the time.

The move comes days after President Donald Trump said that he was ordering a blockade of sanctioned oil tankers entering and leaving Venezuela.

Just a day after the United States seized an oil tanker near Venezuela, another operation is underway. It would mark the third seizure in under two weeks.

Tanker loading in Venezuela dwindled on Monday, following U.S. action against two more ships and as state-run energy company PDVSA struggles to recover from a cyberattack.

The move comes after US President Donald Trump ordered a "blockade" of sanctioned oil tankers entering and leaving Venezuela.

It's the second time in recent weeks that the United States has interdicted a tanker, and it comes amid a large U.S. military build-up in Latin America.

Personnel from the United States boarded and seized a vessel off the coast of Venezuela on Saturday, according to an official familiar with the matter, as the Trump administration ramps up pressure on Caracas.

A U.S. official confirms to Fox News that the Coast Guard, assisted by the Navy seized a second oil tanker near Venezuela on Saturday in accordance with President Donald Trump's blockade.

Closely tied to Washington during much of the Cold War, Venezuela has gone through political upheavals over the years that now make it a major enemy in the eyes of the Trump administration.

The US is pursuing a vessel in international waters near Venezuela on Sunday after attempting to intercept it, a US official said, as President Donald Trump’s administration tightens its crackdown on the country’s oil industry.

The U.S. campaign to topple President Nicolás Maduro is stranding Venezuelans around the world, compounding the misery of a beleaguered population.