Russia says it may seek early repayment of a $3 billion loan to Ukraine.
Russian news agencies quoted Finance Minister Anton Siluanov as saying on January 10 that Moscow had "every reason" to demand repayment, as Ukraine's public debt has exceeded 60 percent of gross domestic product, violating the terms of the bond issue.
Siluanov added that a decision had not been reached.
The bond was purchased by Russia in December 2013, and repayment is due in December 2015.
Siluanov's comments come before a planned meeting of Ukrainian, Russian, German, and French foreign ministers in Berlin on January 12 as part of diplomatic efforts to end the conflict in eastern Ukraine.
They also come as representatives of the International Monetary Fund are visiting Kyiv to review Ukraine's austerity measures before releasing additional financial assistance to help the country's beleaguered economy.