Russian Foreign Minister Sergey Lavrov on Saturday said any aggressive actions made toward Russia will be met with a “decisive response.”

His message follows speculation from some NATO members that the Kremlin could aim to expand its war with Ukraine to other Eastern European nations, after Russian jets recently flew into Estonia and drones were tracked in the Polish and Romanian airspace.

“Russia has never had and does not have any such intentions” of threatening European borders, Lavrov said on Saturday. 

“However, any aggression against my country will be met with a decisive response. There should be no doubt about this among those in NATO and the” European Union (EU), he added during his Saturday address at the United Nations General Assembly in New York.

World leaders have been carefully measuring the Kremlin’s efforts to end the war in Ukraine after Russia invaded its neighbor more than three years ago. Lavrov on Thursday accused NATO and the EU of declaring a “real war” with Russia and directly participating in the conflict in Ukraine, adding that the two multilateral organizations “are directly participating in it,” according to a translation by Russian-state media TASS of his remarks at a G20 meeting of foreign ministers at the U.N.

Russian President Vladimir Putin last met with President Trump in August in an attempt to negotiate a ceasefire with Ukraine, but talks have been stalled since their face-to-face in Alaska. Since then, Putin has ordered strikes on the Ukrainian capital of Kyiv and launched deadly attacks on other cities in the country. 

Lavrov claimed on Saturday, however, that Putin’s plans are to contain the war to Ukraine. 

“Threats of force against Russia, accused of practically planning an attack on the North Atlantic Alliance and the European Union, are becoming increasingly common,” Lavrov said. “President Putin has repeatedly debunked such provocations. Russia has never had and does not have such intentions, but any aggression against my country will be met with a decisive response.”

The foreign minister acknowledged concerns about drones entering foreign airspace and said he understood efforts to mitigate security threats if boundaries are breached.

“Try to understand that a drone, when it is flying not over our territory, but if it crosses someone’s border but has left our airspace, probably everyone has the right to do with that drone whatever they consider necessary to ensure their security,” Lavrov said at a news conference after his U.N. remarks.

“But if there are attempts to shoot down any flying object, or indeed any object at all, on our territory, in our airspace, then I think people will seriously regret it, undertaking such a gross violation of our territorial integrity, our sovereignty.”