MOSCOW — Russia's chief military officer says the nation is facing an increased threat of being drawn into conflicts at its borders that may grow into an all-out nuclear war.

Gen. Nikolai Makarov, chief of the General Staff, pointed at NATO's expansion eastward and said Thursday that the risks for Russia to be pulled into local conflicts have "risen sharply." He added, according to Russian news agencies wires, that "under certain conditions local and regional conflicts may develop into a full-scale war involving nuclear weapons."

A steady decline of Russia's conventional forces has prompted the Kremlin to rely increasingly on nuclear deterrent. Its military doctrine says it may use nuclear weapons to counter a nuclear attack on Russia or an ally, or a large-scale conventional attack that threatens Russia's existence.