Russian Foreign Minister Sergei Lavrov has told Poland to study Moscow's military doctrine "carefully" after Warsaw said it wanted to produce missiles for US-made Patriot air-defence systems.

"We have a military doctrine on this matter, which the President has cited repeatedly. I urge you to study carefully the relevant section of this crucial document," Lavrov said at the Valdai Discussion Club on September 29, according to TASS. He did not say which section he meant or what Russia might do.

Lavrov made the remark as Poland expanded its role in the Patriot programme, which supplies the interceptors Ukraine relies on against Russian ballistic missiles. Russia's guidance on when it may use nuclear weapons, the Fundamentals of State Policy on Nuclear Deterrence that Vladimir Putin signed in November 2024, is the document the Kremlin has cited most often when it warns European capitals over military aid to Kyiv, UAWire noted.

Warsaw has been widening its pitch for months. Poland offered to host a Patriot missile plant for Ukraine on its own soil in late September, arguing it would be safer from Russian strikes. A Polish delegation in the US from September 23 to 25 also discussed setting up a maintenance and service centre for PAC-3 missiles in Poland, joint production and future deliveries, the defence ministry confirmed.

Polish industry already makes parts of the system. Huta Stalowa Wola signed a deal with Raytheon Polska in 2024 to build 48 M903 launchers for Poland's Wisla air-defence programme, and in September state-owned WZE signed agreements with Lockheed Martin and Raytheon to make components for the PAC-3 MSE interceptor and the LTAMDS radar. The first Polish-made PAC-3 MSE parts are due to be shipped to the US in 2027.

Interceptors remain the scarcest item in Ukraine's air defences. Germany has pressed Washington to allow PAC-3 production in Europe, and Warsaw is preparing a small new batch of Patriot missiles for Kyiv, without saying how many.

Poland has also been tightening its own air defences as Russian drones stray over the border, changing its rules to allow faster shoot-down decisions.