The main objective of Russia's "military operation" in Ukraine is to "protect Donetsk and Luhansk People's Republic", RIA cited Kremlin's spokesman Dmitry Peskov as saying on Monday.
"In general, the protection of the republics is the main goal of the special military operation," Peskov said.
Donetsk and Luhansk are two breakaway Russian-backed entities in the Donbas region of eastern Ukraine, which Russia says it is fighting to remove entirely from Kyiv's control.
Russia recognised the two regions as independent states on the eve of its invasion of Ukraine. Separatists seized control of large swathes of eastern Ukraine in 2014.
Moscow calls its actions a "special military operation" to disarm Ukraine and protect it from fascists. Ukraine and its allies in the West say the fascist allegation is baseless and the war is an unprovoked act of aggression.
Denis Pushilin, the leader of the Russian-backed separatist Donetsk region of Ukraine, had said earlier on Monday that there has been increased fighting and shelling in the region.
"All necessary forces, including the allied ones, including the forces of the Russian Federation, will be involved in order to counter the enemy," Pushilin said.
