Ukrainian President Poroshenko said government forces would renew offensive operations against pro-Russian rebels and "free our lands".
David Hauner of BofA Merrill Lynch Global Research comments on the bank runs in Bulgaria, and says they are likely related to the Ukraine/Russia crisis.
Both food and gas prices are on the rise, and the link between them could cause more consumer headaches this summer.
Pro-Russian separatists in Ukraine have freed 4 international observers they were holding, reports CNBC's Simon Hobbs; and Michelle Caruso-Cabrera points out the bottom in Russia's market.
Ukraine has signed a landmark trade deal to bind itself to the EU in a direct rebuke of Russian efforts to block the country from turning westward, reports CNBC's Julia Chatterley.
The Ukrainian President has told CNBC his country will 'defend itself' against Russia if it fails to de-escalate tensions in east Ukraine by Monday.
Ukrainian President Poroshenko is in Brussels to meet with EU leaders about what to do about the situation with Russia, reports CNBC's Julia Chatterley.
Irakli Garibashvili, Georgian prime minister, comments on the free trade agreement between Georgia and the European Union and on Georgia's relations with neighboring Russia.
Ukraine may want to sell energy assets to Western firms. But Russia may have something to say about it.
It is possible for Ukraine to free itself from dependence on Russian natural gas, according to Oilprice.com.
Matthew Clements, deputy head of Europe and CIS Analysis at IHS Country Risk, says Russia doesn't want to be militarily involved in Ukraine to reduce the threat of sanctions and discusses the Ukrainian rebels.
Andrew Wood, former British ambassador to Russia and associate fellow for Russia and Eurasia Programme at Chatham House, comments on Russia and the impact of the Ukraine crisis.
Tatiana Orlova, senior economist for Russia, CIS and Israel at RBS, says that President Vladimir Putin's comments on the ceasefire between Ukraine and rebel leaders are positive for all Russian assets.
Russian shares leapt to a five-month high after President Vladimir Putin asked parliament to revoke Russia's right to send troops to Ukraine.
Mark Mobius, executive chairman at Templeton Emerging Markets Group, discusses the opportunities to be found in Iraq and Russia.
Russian troops along Ukraine's border and the establishment of defense units by Russian authorities are troubling developments, the White House said.
Igor Sechin, the CEO of Rosneft, Russia's top oil producer, has slammed the U.S.'s decision to hit him with sanctions as making no sense.
Chris Weafer, senior partner at Macro-Advisory, says the sanctions on Russia have been successful in making foreign companies wary of dealing with Russian companies and discusses the possibility of further measures.
Christopher Granville, managing director at Trusted Sources, says the politics between Russia and Ukraine are calming, but fighting continues on the ground.
Igor Sechin, CEO of Rosneft, says the company is "not perceived in the right way" and is considered to be a state-owned company.