NATO's four-month long military exercises near Russia's borders, known as Steadfast Defender, are proof the alliance is preparing for a potential conflict with Russia, a spokeswoman for Russia's Foreign Ministry said on Saturday.

Hungarian foreign minister Péter Szijjártó warned against a NATO country getting directly involved in the Russia-Ukraine war.

"This includes sabotage, acts of violence, cyber and electronic interference, disinformation campaigns, and other hybrid operations," the alliance said.