Ukraine on Friday banned Russian men of combat age from entering the country, a move introduced under martial law after Russia fired on and captured three Ukrainian naval ships off Crimea last weekend.
Ukraine on Monday imposed martial law for 30 days in parts of the country most vulnerable to an attack from Russia after President Petro Poroshenko warned of the "extremely serious" threat of a land invasion.
A car bomb this week killed Col. Maksym Shapoval, a top Ukrainian military intelligence official. It wasn’t the only high-profile assassination that’s struck Kiev lately — nor is it the only one Ukraine is blaming on Russia.
Denis Voronenkov was a former Russian lawmaker. He was also a critic of Russian President Vladimir Putin. And he was assassinated in broad daylight on Thursday in the Ukrainian capital, Kiev. Ukraine's leaders are pointing the finger at Russia.
One of the many tensions in Ukraine has been over language. Ukrainian used to be considered the language of peasants, while Russian was the language of the educated. This story from our archives shows how the push-pull between Russia and Ukraine has been going on for many decades.
For our Geo Quiz, we were looking for the name of the capital of Ukraine. The answer is Kiev. The BBC's Gabriel Gatehouse reports on a controversy a local TV show that asked viewers to name the greatest Ukrainian of all time.
After the collapse of the Soviet Union, many Ukrainians left their country to find better jobs in the West, but now, some Ukrainians are reversing the pattern and are heading home because of new economic opportunities in Ukraine
The answer to today's Geo Quiz is Kyiv (Kiev), the capital of Ukraine. Russian translator Marian Schwartz reads a short passage from "The White Guard," Mikhail Bulgakov's novel set in the city of Kyiv.
The opening of Soviet and East European archives has provided historians a tidal wave of new information about the crimes of Soviet leader Josef Stalin. Brigid McCarthy reports on one historian's work.
Members of parliament in Ukraine threw eggs, fists, and smoke bombs today in response to a controversial deal to extend an agreement with Russia that gives them a naval base on the Dead Sea in exchange for discounted natural gas.