Polish Interior Minister Marcin Kierwinski said Poland was treating the incident with the "utmost seriousness."

Two Russian drone strikes hit near the Polish border early on September 13, Ukrainian authorities have reported, attacks that Kyiv said was Moscow “knocking on the doors of the EU…

"Drones were operating and even striking targets located very close to the Polish border," Polish Armed Forces' Operational Command spokesperson Jacek Goryszewski said.