German Chancellor Angela Merkel said on Monday that cooperation with Russia was needed to address some international issues amidst threats to strengthen sanctions against Russia.
Russian President Vladimir Putin and U.S. Secretary of State John Kerry on Tuesday discussed closer Russia-U.S. cooperation on the Ukraine crisis, presidential aide Yuri Ushakov told reporters.
A law recently approved by the Ukrainian parliament that sets new conditions for eastern regions to assume special status has triggered fears that an uncertain cease-fire in the conflict-torn area could collapse.
European leaders and U.S. President Barack Obama said they would consider a "strong reaction" if the Feb. 12 Minsk agreement was not respected, according to an official statement from the French president's office on Tuesday.
U.S. and some European leaders on Tuesday conditioned the easing of sanctions against Russia on a "full implementation" of peace deals over eastern Ukraine.
Leaders of France, Germany, Russia and Ukraine on Thursday urged the warring sides in Ukraine to fully comply with the measures agreed upon in the Belarus capital of Minsk last week, amid reports of frequent violations of ceasefire.
Top leaders of Russia, Germany and Ukraine have agreed on the monitor mission of the Organization for Security and Cooperation in Europe (OSCE) in eastern Ukraine, said the Kremlin on Tuesday.
The world on Thursday breathed a sigh of relief when the leaders of Russia, Germany, France and Ukraine eventually agreed to a much-anticipated cease- fire deal on the Ukraine crisis after intensive negotiations.
The latest round of peace talks on Ukraine crisis on Saturday ended in the Belarusian capital of Minsk without an agreement.
Russian President Vladimir Putin has been trying to ask parties involved in Ukraine crisis to spare no effort in peacefully settling the situation.