Russia’s Foreign Minister, Sergei Lavrov has said military focus in Ukraine is no longer “only” the east of the country.
In an interview with Russian state media, he implied Moscow’s strategy had changed after the West supplied Ukraine with longer-range weapons.
Russia would now have to push Ukrainian forces further from the front line to ensure its own security, he explained.
U.S had earlier accused Russia of preparing to annex parts of Ukraine.
Russia invaded Ukraine in February, claiming falsely that Russian-speakers in Ukraine’s eastern Donbas region had suffered a genocide and needed to be liberated.
Five months on, Russia has occupied parts of the east and south of the country, but it failed in its original aim of capturing Kyiv and has since claimed its main objective was the liberation of Donbas.
Since February, the West has supplied Ukraine with increasingly powerful weapons to use in its defence against Russian forces.
Mr Lavrov says that has forced Russia to expand its objectives further.