The sanctions sharply escalate tensions with the leftist leader of a country that has traditionally been one of the closest U.S. allies in South America.

President Donald Trump's administration announced Wednesday new "massive sanctions" against Russia's oil industry that are aimed at bringing an end to Moscow's brutal war on Ukraine.

Trump tells NATO members they need to cut off Russia energy purchases before he will take bigger steps to isolate Russia over its war in Ukraine.

A bipartisan coalition has joined forces to push aggressive new sanctions on Russia and believe the souring relationship between President Trump and Vladimir Putin has created a new opening.

Gulf states are keen to invest in Syria, which has important mineral and oil reserves, but had been prevented from doing so by U.S. sanctions. President Trump has now pledged to lift the restrictions.

Cuban government declares an "energy emergency" after the failure of one of its few power plants plunges it into an island wide blackout.

In response to a new round of U.S. sanctions, Russia announced Friday that it was banning 500 Americans from entering the country, including former President Barack Obama and comedian Stephen Colbert.

Sanctions backfire. So why do we keep using them?

Russia would have to use tankers willing to get around sanctions to ship its crude to Asia. It's known in the oil industry as a "shadow fleet."

When sanctions were enacted against Russia in February of this year, many forecasts were of an imminent collapse in the Russian economy. A new report looks at why that hasn't happened.

Russia's economy is weathering sanctions over the war in Ukraine, but tough times may be ahead, according to an assessment from experts.

Russia's economy is weathering sanctions over the war in Ukraine, but tough times may be ahead, according to an assessment from experts.

A roundup of key developments and the latest in-depth coverage of Russia's invasion of Ukraine.

The EU chief concedes that that getting all 27 member countries — some of them highly dependent on Russia for energy supplies — to agree on oil sanctions will be extremely difficult.

The U.S. joined the European Union and Group of Seven nations in enacting new sanctions on Russia in response to the civilian toll reported in Bucha and elsewhere in Ukraine in recent days.