Poland's military on Wednesday condemned multiple violations of its country's airspace during a Russian operation on neighbouring Ukraine as an "act of aggression", saying that it had spotted a dozen drone-type objects and downed some.

"An unprecedented violation of Polish airspace by drone-type objects took place," the operational command of Poland's armed forces said on social media.

"This is an act of aggression that has created a real threat to the safety of our citizens."

Poland said that "hostile objects" had been downed by Polish or allied aircraft scrambled in response to multiple violations of its airspace.

"Aircraft have used weapons against hostile objects," Defence Minister Wladyslaw Kosiniak-Kamysz said on social media, adding: "We are in constant contact with Nato command."

Russian drones and missiles have entered the airspace of Nato members including Poland several times during the Ukrainian conflict, but a Nato country has never attempted to shoot them down.

Ukraine's foreign minister said on Wednesday that Russian drones flying into Poland demonstrated Russia's impunity.

"This situation shows that finally the decision needs to be taken to enable partner air defence capabilities in neighbouring countries to be used to intercept drones and missiles in the Ukrainian air space, including those approaching Nato borders," Andrii Sybiha said. (Agencies)