Russian Deputy Foreign Minister Sergei Ryabkov said on Feb. 27 that accusations from U.S. Secretary of State John Kerry that Russia was lying over its involvement in eastern Ukraine went "beyond diplomatic ethics", Interfax reported.
Russia's War Against Ukraine
Reuters: Russia says Kerry’s accusation Moscow is lying ‘beyond diplomatic ethics’
Ukrainian President Petro Poroshenko (R) and US Secretary of State John Kerry shake hands after their press conference in Kiev on Feb. 5, 2015.