Russian military planes have briefly violated Lithuania's airspace, the Lithuanian president said, condemning what he called a blatant breach of the territorial integrity of his European Union and NATO-member country.

Lithuania's foreign ministry planned to summon Russian diplomats in the Lithuanian capital of Vilnius to protest the violation they say happened late on Thursday (Friday AEDT), President Gitanas Nausėda said in a post on X.

"This is a blatant breach of international law and territorial integrity of Lithuania," Nausėda wrote on X.

"Once again, it confirms the importance of strengthening European air defence readiness."

There was no immediate comment from Moscow.

Baltic nations have already been on heightened alert over neighbouring Russia's aggression on Ukraine.

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