The US Coast Guard stopped and boarded an oil tanker in the Caribbean early Saturday that was last docked in Venezuela, Homeland Security Secretary Kristi Noem said, after President Donald Trump ordered a blockade.

U.S. forces on Saturday stopped a second merchant vessel off the coast of Venezuela in international waters, two American officials told The Associated Press

Trump orders total blockade of Venezuelan oil tankers as the South American nation controls world's largest oil reserves with over 300 billion barrels.

The fleet of ghost ships Venezuela uses to smuggle part of its oil to black markets, which President Donald Trump vowed this week to stop with a military blockade, is made up of dozens of old tankers and operates following the example of other nations under sanctions such as Russia and Iran,