The Kremlin on Tuesday said it had no information about whether or not Iranian "Kamikaze" were used in large-scale attacks against Ukraine earlier this week.
Leaders in Ukraine have accused Russia of using Iranian Shahed-136 drones in attacks against Kyiv.
Asked if Russia did use the Iranian drones in the attack on Monday, Kremlin spokesman Dmitry Peskov said the Kremlin did not have any information about their use.
He also added that the four regions of Ukraine that Russia declared it had annexed in recent weeks fall under the protection of Russia's nuclear arsenal.
These territories are inalienable parts of the Russian Federation ... and their security is provided for at the same level as the rest of Russia's territory," he stressed.