In an exclusive interview with NBC News' Meet the Press programme, Ukrainian Prime Minister Arseniy Yatsenyuk warned of Vladmir Putin's aggression and how further expansion and aggression from Russia could be "the biggest disaster of this century."
Speaking to David Gregory, Mr Yatsenyuk was asked what he thought of Mr Putin's referal to Novorossiya, a historical term for an area north of the Black Sea which was conquered by the Russia Empire in the 18th century. He said:
Mr Yatsenyuk also expressed concern that Moscow has breached nuclear non-proliferation agreements.
The Ukrainian prime minister also said that those behind an anti-Semitic leaflet in the eastern city of Donetsk earlier in the week will be held responsible.