WASHINGTON, Dec 16 (Reuters): U.S. President Donald Trump ordered on Tuesday a "blockade" of all sanctioned oil tankers entering and leaving Venezuela, in Washington's latest move to increase pressure on Nicolas Maduro's government, targeting its main source of income.

It is unclear how Trump will impose the move against the sanctioned vessels, and whether he will turn to the Coast Guard to interdict vessels like he did last week. The administration has moved thousands of troops and nearly a dozen warships - including an aircraft carrier - to the region.

"For the theft of our Assets, and many other reasons, including Terrorism, Drug Smuggling, and Human Trafficking, the Venezuelan Regime has been designated a FOREIGN TERRORIST ORGANIZATION," Trump wrote on Truth Social. "Therefore, today, I am ordering A TOTAL AND COMPLETE BLOCKADE OF ALL SANCTIONED OIL TANKERS going into, and out of, Venezuela."

In a statement, Venezuela's government said it rejected Trump's "grotesque threat."

U.S. crude futures climbed over 1% to $55.96 a barrel in Asian trading after Trump's announcement. Oil prices settled at $55.27 a barrel on Tuesday, the lowest close since February 2021.

Oil market participants said prices were rising in anticipation of a potential reduction in Venezuelan exports, although they were still waiting to see how Trump’s blockade would be enforced and whether it would extend to include non-sanctioned vessels.

Photo from Reuters