President Barack Obama said on Sunday the United States will not recognize the Crimean referendum, vowing to impose fresh sanctions on Russia.
Sanctions against Russia over the conflict in Crimea would prove economically costly and would be detrimental to all sides, Austrian experts said Thursday.
U.S. Secretary of State John Kerry on Thursday threatened "a very serious series of steps" against Russia with the European Union in response to Crimea's vote on Sunday to break away from Ukraine.
U.S. President Barack Obama on Wednesday rejected the legitimacy of a referendum on the future of Ukraine's Crimea region and expressed strong support for the new government in Kiev.
Yurii Klymenko, permanent representative of Ukraine to the UN, on Tuesday reiterated that the upcoming referendum on Crimea's status scheduled on March 16 "is illegitimate under the constitution of Ukraine."
Russian Foreign Minister Sergei Lavrov said Monday that Moscow was not satisfied with U.S. proposals on settling the Ukrainian political crisis, and has drafted its own document to "put the situation on the basis of international law."
As the U.S. considers implementing additional sanctions against Russia over the latter's recent moves in Ukraine's Crimea, former U.S. Defense Secretary Robert Gates said Sunday that such measures will not deter Russia.
U.S. President Barack Obama proposed a diplomatic resolution once again on Thursday to the ongoing crisis in Ukraine in his phone talks with Russian President Vladimir Putin.
The proposed upcoming referendum in Crimea would violate Ukraine's Constitution and the international law, and any discussion on the future of Crimea should include the Ukrainian government, U.S. President Barack Obama said Thursday.
British Foreign Secretary William Hague on Wednesday vowed to try "every diplomatic opportunity" to de-escalate crisis in Ukraine.
Russian Investigative Committee (IC) issued an arrest warrant on Monday for Dmitry Yarosh, leader of Ukraine's radical Right Sector movement.
U.S. President Barack Obama said on Monday that his administration is examining "a whole series of" economic and diplomatic steps to "isolate" Russia over its refusal to withdraw military forces from the Ukrainian republic of Crimea.
German Chancellor Angela Merkel on Sunday told Russian President Vladimir Putin that Russia broke international law with its intervention in Crimea, a deputy spokesman of German government said.
Russia is trying to justify its possible military action in Ukraine as NATO accuses Moscow of "threatening Europe's security", while the United Nations calls for "cooler heads" and Ukraine warns of Russian "aggression."
The White House on Thursday urged Russia to respect Ukraine's territorial integrity and sovereignty amid festering events unfolding in Ukraine's Russian- speaking Crimea peninsula.
The United States and Britain said Tuesday that they do not see "a zero-sum" game in Ukraine, where a pro-Russia president was replaced with a West-leaning leadership in a series of dramatizing events over the weekend.
Development of Russia causes fears among some world powers but those fears were groundless, President Vladimir Putin said Monday.