The Kremlin said on Monday that further supplies of Western weaponry to Ukraine would only lead to further escalation of the conflict there.
Kremlin spokesman Dmitry Peskov said NATO member countries were becoming more involved in the conflict, but that their provision of arms to Ukraine would not change the course of the conflict.
Last week, Germany and the United States announced they would supply main battle tanks to Ukraine, for the first time pledging unambiguously offensive weapons to help it resist Russian forces.
