U.S. Vice-President Joseph Biden in a telephone talk with Ukrainian Prime Minister, who on the eve announced his intention to resign, thanked Yatseniuk for his partnership during a historic time for Ukraine.

"The Vice President thanked Prime Minister Yatseniuk for his partnership during a historic time for Ukraine. He congratulated the government of Ukraine on its accomplishments over the past two years, in particular on the strides it has made on difficult but necessary economic reforms, the signature of the European Union association agreement, and the work it has done to increase energy independence," according to readout of Biden's call with Yatseniuk.

According to the document posted on the website of the U.S. Embassy in Kyiv, the leaders agreed these changes must be irreversible and that continued progress is critical to securing a prosperous future for the people Ukraine.

Besides, they agreed on the importance of assembling a new cabinet committed to implementing needed reforms, in particular those recommended by the International Monetary Fund and European Union.

Biden also commended Yatseniuk for his "tireless efforts on behalf of Ukraine" and his intention to remain engaged in the process of pursuing these and other reforms needed to ensure the stability, prosperity, and territorial integrity of Ukraine.