It was seen as a way for Russia to prop up its currency and retaliate for Western sanctions, but it could cause global energy prices to spike. One analyst sees it as a warning to the rest of Europe.
A roundup of key developments and the latest in-depth coverage of Russia's invasion of Ukraine.
The governments of the two European countries said Russian energy giant Gazprom informed them it was halting gas supplies starting Wednesday.
This weekend would normally be a celebratory one for Ukrainians. But Easter Sunday marks two months since the latest Russian invasion. More than 40,000 refugees have found themselves in Bulgaria.
A Bulgarian cybersecurity expert was arrested by police after being accused of involvement in the hack of millions of records from the nation's tax agency.
Viktoria Marinova's death sparked an international outcry over the dangers journalists face. Bulgarian officials say the evidence shows she was the victim of a sex crime and not targeted for her work.
A suspect was briefly detained Tuesday, but was let go. Bulgarian officials have indicated Viktoria Marinova was not targeted for her work, and that no suspect or motive has been yet uncovered.
Bulgaria has long been a drug trafficking hub. As recently as the 1990s, the government looked the other way. Now a European Union member, it's working to stop the flow of Afghan heroin into Europe.