The latest action is a broadening of its decision to suspend cooperation with Moscow over Russia's annexation of Ukraine's Crimea region.
Buildings were also seized in Kharkiv and Donetsk, where pro-Russia demonstrators called for a “people’s city council.”
Crimeans now have nowhere to turn for American hamburgers, or heroin-addiction treatment.
The U.S. wants its European allies to spend more money for the military. There is just one problem: The Europeans don't have it.
Ukrainian officials have accused Russia of sending FSB operatives, and explosives, into the country to stamp out anti-government protests.
Sadly, we won't see the Sith Lord leading Ukraine, at least not the next six years.
Mexico fought back from a two-goal half-time deficit to earn a 2-2 draw with the United States in an international friendly in Arizona on Wednesday.
Move aims to ease tension after Moscow accused the bank of illegally blocking the transaction.
Yanukovych reportedly admitted on Wednesday that he “was wrong” to invite Russian troops to Crimea, which is now under Russian control.
NASA's suspension of its relations with Russia, outside of cooperation over the ISS, highlights the agency's dependency on Russia.
Dmytro Firtash, one of Ukraine's richest men, was closely associated with Viktor Yanukovych and aided the flow of gas between Russia and Ukraine.
NATO cites key signs at the border indicating that Russia may be ready to pounce.
Russia's continued troop movements on Ukraine border worry NATO commander
A Russian news organization reported that Ukraine had asked to resume normal relations with Russia once again.
In a statement, the Russian Foreign Ministry suggested the action would have consequences for the U.S. embassy and consulate in Russia.
The E.U.'s effort is expected to be supplemented by both U.S. and IMF aid packages.
Ukraine will now have to pay $385.5 per 1,000 cubic meters of gas in the second quarter, an increase from the $268.5 agreed in December.
Chevron has signed an exploration agreement with Polish gas giant PGNiG - this after several companies left over disappointing drilling results.
In Ukraine's growing tech sector, highly skilled workers are fleeing Russian rule in Crimea to work in western parts of the nation.
Russian PM Medvedev flaunted Russia's annexation of Crimea on Monday by flying there and announcing a special economic zone for the region.
The U.S. Department Of State is supposed to be the go-to source for advice on global travel, but its message about Ukraine is baffling.
Kerry tells Moscow that progress depends on a Russian troop pullback from Ukraine's borders.