Reuters: Russia sends nuclear warning to NATO as tensions rise in the Baltic

11:38 01.10.2026 •

Russia has warned NATO it would be ready to resort to nuclear ​weapons if the Western alliance attempted to cut off Kaliningrad, a Russian exclave that borders the Baltic Sea.

In a document sent to NATO and seen by Reuters, Moscow accused the alliance of a "dangerous and reckless course" that entailed "high risks of the outbreak of a direct armed conflict".

The document said this included the possibility of "Russian strikes against decision-making centers in the alliance's member states right from the outset".

"Russia will be ready to use the entire arsenal of forces and capabilities at its disposal, including nuclear weapons, in order to defend its territory should NATO countries undertake any attempt aimed at isolating the Kaliningrad Region from the rest of the country," the diplomatic note said.

The warning highlighted Moscow's urgent concern at what it has presented as a growing NATO threat to Kaliningrad, a heavily militarised Russian territory that ⁠is wedged between Poland and Lithuania and is slightly bigger than the US state of Connecticut.

NATO Secretary General Mark Rutte said the alliance had responded to Russia's message by declaring: "We are a defensive alliance. And stop the nuclear threats. This is absolutely not called for and not helpful."

In its written response, seen by Reuters, NATO also said that none of its "exercises or activities pose a threat to the territory of the Russian Federation".

Asked if the risk of nuclear weapons being used against the Baltics was now real, Rutte told a defence conference in Brussels hosted by broadcaster Euronews: "No, it's not. Putin knows that he can never win (against) NATO, so I don't take this that seriously."

Europe says it faces 'hybrid war', Russia denies waging it

In addition to the private warning, Russian embassies in at least three European countries have issued statements in the past three days accusing NATO of escalating tensions through military exercises and planning scenarios involving Kaliningrad.

Kremlin spokesman Dmitry Peskov described ⁠these as diplomatic reminders to "hotheads in Europe".

Relations have sharply worsened this year, with European governments accusing Moscow of stepping up a "hybrid war" on the continent through acts including sabotage and arson.

Russia denies that, and rejects repeated statements by Western politicians that it is gearing up for a possible military attack on a ⁠NATO country.

A senior European defence official said: "(This is the) first time since (the) Cold War that Russia is threatening us like this. So this is serious."

 

read more in our Telegram-channel https://t.me/The_International_Affairs