Ukraine’s Acting Minister for Foreign Affairs, Andriy Deshchytsia, warned Russian Foreign Minister Sergey Lavrov in a phone call on April 7 not to invade his country. “I expressed our concern about the situation,” Deshchytsia told CNN’s Fred Pleitgen, sitting in for Christiane Amanpour. “I also warned him not to use any military force to protect Russians in eastern Ukraine, since we have enough power to protect Russian-speaking [people].”
CNN: Ukraine warns Russia in phone call to not invade

Ukraine's Acting Minister for Foreign Affairs Andriy Deshchytsia.