Polish Prime Minister Donald Tusk said on Monday that Poland would "without discussion" make the decision to shoot down flying objects when they violate Polish territory.

Tusk was speaking during a news conference in Sierakowice in the north of the country.

He said the situation was less clear in other scenarios, when "you really need to think twice before deciding on actions that could trigger a very acute phase of conflict."

Tusk added that in the event of conflict escalation, Warsaw would not be left alone.

Tusk's comments came just over a week after NATO planes downed Russian drones over Poland and heightened fears that the war in Ukraine could spill over.

Recent airspace violations by Russia have been seen as provocations by NATO allies in Europe.