Polish military counterintelligence will investigate those responsible for exposing secret deliveries of Patriot air defense missiles to Ukraine, Defense Minister Wladyslaw Kosiniak-Kamysz has announced.

The controversy erupted on Saturday after several Polish social media accounts reported that Warsaw had quietly transferred US-made PAC-3 Patriot interceptors to Kiev in March without parliamentary approval or informing the public.

Former Defense Minister Mariusz Blaszczak of the opposition Law and Justice (PiS) party backed the whistleblowers, condemning the transfer as a move that weakened Poland’s own air defenses.

“After consulting with Prime Minister Donald Tusk, while maintaining responsibility toward public opinion and in accordance with legal regulations, I have ordered the declassification of all donations to Ukraine for the years 2022-2026,” Kosiniak-Kamysz wrote on X.

He added that he had instructed the Polish Military Counterintelligence Service to investigate those who had “intentionally sought to disclose state secrets.”

The minister noted that Poland’s military aid to Ukraine began under the previous PiS government, when Blaszczak served as defense minister from 2018 to 2023.

Speaking at a press conference on Monday, Kosiniak-Kamysz confirmed that Poland had supplied PAC-3 interceptors from its own stockpiles following a request from NATO Secretary-General Mark Rutte. He insisted, however, that the shipment was too small to significantly affect Poland’s air defenses.

The transfer comes amid mounting pressure on Patriot missile supplies. According to the US-based Foreign Policy Research Institute (FPRI), NATO countries face a backlog of roughly 4,300 Patriot interceptors – equivalent to about seven years of production at 2025 manufacturing rates – after US stockpiles were heavily depleted during the war with Iran.

Blaszczak accused Tusk’s government of undermining Poland’s defenses by sending interceptors to Ukraine while simultaneously warning the public about a potential Russian attack.

Moscow has repeatedly dismissed claims that it intends to attack NATO members.

President Vladimir Putin last month argued that NATO and EU leaders were using their allegations of a Russian threat to justify higher military spending and the “radical militarization” of their countries.