Ukrainian President Petro Poroshenko has accused Russia of sending more than 9,000 troops into Ukrainian territory and has demanded that they leave.
For some Russian officials, annexing Crimea wasn't enough. Now some want to change its name.
The president of the Parliamentary Assembly of the Council of Europe (PACE) has asked the Kremlin-allied speaker of Russia's lower parliament house to help secure the urgent release of Ukrainian military pilot Nadia Savchenko.
Russian Foreign Minister Sergei Lavrov has accused the West of trying to isolate Russia and warned that such efforts would fail.
The human rights group Amnesty International has sharply criticized a Russian bill that would ban "undesirable foreign organizations."
The foreign ministers of Germany, France, Russia and Ukraine were meeting to discuss the crisis in eastern Ukraine, which has witnessed a spike in fighting in recent days.
U.S. President Barack Obama has announced that after years of war and recession, "the shadow of crisis has passed, and the state of the union is strong."
A military spokesman says Ukrainian soldiers on January 20 came under attack from Russian regular forces in the north of the conflict zone in eastern Ukraine.
The chief of Russian gas giant Gazprom says Ukraine's discount "winter price" for natural gas will end on April 1.
Russia says a European Union decision to keep sanctions against Russia in place shows the EU is not ready to change an "unfriendly course" toward Moscow.
Russia says a European Union decision to keep sanctions against Russia in place shows the EU is not ready to change an "unfriendly course" towards Moscow.
A Georgian man fighting on the Ukrainian side in the conflict in Ukraine has been killed in combat near the Donetsk airport, according to relatives.