Western sanctions struggle against Russia's shadow fleet of tankers, maintaining oil revenue critical for funding military efforts.
Read moreThe US has sanctioned eight Venezuelan officials and raised the reward for President Maduro's arrest amid claims of electoral fraud.
Read moreBiden's administration raises the bounty on Nicolás Maduro to $25 million following his controversial re-election amid ongoing Venezuelan political turmoil.
Read moreA Russian oil tanker is drifting in the Baltic Sea near Germany, carrying 99,000 tons of oil. No environmental danger reported.
Read more