An increasingly belligerent Russian President Vladimir Putin could attack the NATO military alliance in less than a decade, Germany’s Defense Minister Boris Pistorius warned.

“We hear threats from the Kremlin almost every day … so we have to take into account that Vladimir Putin might even attack a NATO country one day,” Pistorius told German outlet Der Tagesspiegel in an interview published Friday.

While a Russian attack is not likely “for now,” the minister added: “Our experts expect a period of five to eight years in which this could be possible.”

Following the Kremlin’s full-scale invasion of Ukraine, Russia has upped its aggressive rhetoric against some of its neighbors — including the Baltic countries and Poland, which are all members of NATO, and Moldova — prompting top European defense officials to warn of the risk of a major conflict.