Polish Prime Minister Donald Tusk on Wednesday said his country is the closest to open conflict since World War II, according to multiple reports, likely referring to Russian drones that breached Poland’s airspace overnight.

“I want to emphasize very strongly that there is no reason to claim we’re on the brink of war, but there is no doubt that this provocation exceeds the existing boundaries and is incomparably more dangerous from Poland’s point of view than all the others,” Tusk said, according to a translation from the BBC.

“This situation brings us the closest we have been to open conflict since World War II,” he added.

Early Wednesday, Tusk posted to social platform X that a “huge number” of Russian drones violated the NATO member’s airspace.

“Those drones that posed a direct threat were shot down,” he added. “I am in constant communication with the Secretary General of NATO and our allies.”

His comments echoed a similar announcement made by the Polish Armed Forces the night before, as tensions in Eastern Europe remain high amid the Russia-Ukraine war. The military warned residents against exiting their homes amid the effort to intercept the alleged drones.

“My thanks and congratulations to the Polish Operational Command and our NATO pilots for shooting down Russian drones over Poland. Actions speak louder than words,” the Polish prime minister posted to X later Wednesday.

NATO Secretary-General Mark Rutte and U.S. officials alike said they were weighing a response.

At least one lawmaker has blasted the incursion, calling it an “act of war.”

“Russia is attacking NATO ally Poland with Iranian shahed drones less than a week after President Trump hosted [Polish] President [Karol] Nawrocki at the White House,” Rep. Joe Wilson (R-S.C.) wrote in a post online late Tuesday.

“This is an act of war, and we are grateful to NATO allies for their swift response,” he added.