NATO says it is suspending "all practical civilian and military cooperation" with Russia in response to Moscow's annexation of Ukraine's Crimea.
Since Ukraine's new government took shape in late February, the Russian Foreign Ministry has consistently decried alleged persecution of ethnic Russians in the country, then expanding that to include other minorities.
A computer program capable of vetting words and tone has produced a list of Russia's most "anti-Russian" news outlets.
The veteran leader of the Crimean Tatars has called on the UN Security Council to send peacekeeping forces to Crimea.
Russia's state-controlled gas giant, Gazprom, has announced that it is increasing the price of natural gas for Ukraine to $385.5 per 1,000 cubic meters in the second quarter from the previous rate of $268.5.
NATO foreign ministers are gathering in Brussels to discuss the situation in Ukraine, where Russia has annexed Crimea and troops have been amassed on the Russian side of the border.
The UN Security Council has held an informal council meeting on Crimea.
Russia's Defense Ministry says a motorized infantry battalion is being withdrawn from the southern Rostov region after ending military drills.
The Kremlin says Russian President Vladimir Putin told German Chancellor Angela Merkel in a telephone conversation on March 31 that measures were needed to remove the "blockade" on Moldova's breakaway Transdniester region.
German Finance Minister Wolfgang Schaeuble says Russia's seizure of Crimea is comparable to the Nazi aggression in 1938 that led to the annexation of German-speaking regions of Czechoslovakia.
The Polynesian island nation of Tuvalu has retracted its 2011 recognition of Georgia's breakaway regions of Abkhazia and South Ossetia.
Ukraine has denounced as a "crude violation of the rules of international behavior" a visit to Crimea by Dmitry Medvedev in which the Russian prime minister announced a plan to make the annexed peninsula a special economic zone.