Secretary of State Mike Pompeo, flanked by Defense Secretary Mark Esper, Treasury Secretary Steven Mnuchin and Commerce Secretary Wilbur Ross, said the administration would sanction Iran's Ministry of Defense and Venezuela's Nicolas Maduro.
U.N. fact-finding mission's Francisco Cox made the comments during a news briefing.
The U.S., with the assistance of foreign partners, confiscated a total of 1.1 million barrels of petroleum from four foreign-flagged oil tankers, as Tehran and Caracas attempt to sidestep U.S. sanctions.
Gasoline is scarce in Venezuela due to a near-complete breakdown of the OPEC nation's 1.3 million barrel-per-day refining network.
The hearing represents an extraordinary case for the crisis-stricken South American country.
The gold is being retained at the Bank of England as a result of U.K. and U.S. sanctions on the crisis-stricken South American country.
The State Department did not provide any immediate comment on the alleged arrests. U.S. officials have strongly denied any U.S. government involvement in the incursions.
Famines of "biblical proportions" are becoming a serious risk as the coronavirus crisis threatens to double the number of people nearing starvation, a U.N. body has warned.
Rosneft announced its withdrawal from its oil projects in Venezuela on Saturday through a coordinated sale of assets to an undisclosed company controlled by the Russian government.
Guyana is set to decide on a new government to oversee the highest amount of oil per person of any country in the world.
On Tuesday, the US tightened financial restrictions on Venezuela, blacklisting a subsidiary of Russian oil firm Rosneft.
Trump introduced Guaidó at Tuesday's State of the Union address as Venezuela's "true and legitimate" leader.
The year ahead is likely to provide the most profound trial yet for that thesis and for the durability of China's rise.
Guaido's arrival in Davos comes exactly one year after the opposition leader declared himself to be Venezuela's rightful interim president.
Venezuela's internationally-recognized government concedes the last 12 months have been "very tough."
In a move to back Venezuelan opposition leader Juan Guaido, the Trump administration sanctioned aircraft used to support the regime of Nicholas Maduro.
One must travel to the Middle East to better sense the earthquake set off by the US drone strike that killed Iran's legendary General Qasem Soleimani a week ago, writes Fred Kempe.
Juan Guaido, the leader of Venezuela's internationally-recognized government, was prevented from entering parliament on Sunday.
"The goal was to arrange Maduro's peaceful exit to allow a transition to a democratically elected government," former Rep. Pete Sessions' spokesman told CNBC.
The IMF believes one of South America's smallest countries is likely to see a dramatic upswing in economic growth next year.