Vladimir Putin is reportedly weighing a new wave of attacks on Ukraine and, according to three Kremlin‑linked sources cited by Bloomberg, may even contemplate the use of tactical nuclear weapons. The speculation comes as US Director of National Intelligence John Ratcliffe made an unexpected flight to Moscow to warn Moscow against any aggression towards NATO members.

Bloomberg's reporting, based on unnamed Kremlin insiders, says the Russian leadership is preparing to intensify ballistic missile strikes on Kyiv and other Ukrainian cities. While the possibility of a nuclear option is described as "not ruled out", experts stress that no concrete evidence points to an imminent crossing of the nuclear threshold.

What tactical nuclear weapons would mean for Europe

Tactical nuclear arms are lower‑yield devices with a shorter range than strategic missiles. Their destructive power is still considerable and could contaminate a wide area, even if the intent is not to obliterate an entire city. Military analyst Gustav Gressel, speaking to Slovak outlet Denník N, called the nuclear scenario "highly unlikely", noting that Moscow can achieve escalation through conventional means such as a surge in missile launches.

Gressel added that a partial mobilisation is being discussed within Russia's security apparatus. "Radical factions argue the West is too cowardly to act, and they can portray the conflict as a war waged against Russia by the West," he said. He warned not to underestimate Russia's capacity for "stupid" moves, even if a full mobilisation remains uncertain.

US warning and the Baltic alarm

According to the Wall Street Journal, Ratcliffe arrived in Moscow aboard a Boeing C‑17 to deliver a direct warning that any attack on NATO territory would be met with a strong response. US officials fear that, under pressure from a deteriorating front in Ukraine and domestic unrest, Putin could test the cohesion of the Alliance with a limited strike, ranging from a cyber‑attack to a small‑scale ground incursion, likely aimed at one of the Baltic states.

Politico, citing the same sources, highlighted Lithuania, Latvia and Estonia as the most vulnerable. The concern is echoed in a letter obtained by RFE/RL addressed to European Commission President Ursula von der Leyen. Commissioners from the Baltic nations, Finland and Poland, together with the EU's foreign policy chief, warned of a "deteriorating security environment" marked by an increase in airspace violations and drone incursions.

These warnings arrive at a time when Russia is grappling with a second wave of fuel shortages. Ukrainian strikes on Russian refineries and energy infrastructure have disrupted supply chains, leaving many Russian motorists unable to fill up. In response, the Kremlin issued a decree to nationalise companies that cannot defend themselves against drone attacks, a move that further concentrates state control over the energy sector.

Impact on European energy markets and workers

Europe watches the Russian fuel crisis closely. Disruptions to Russian refining capacity can reverberate across European markets, potentially raising fuel prices for households already burdened by inflation. Trade unions in several EU states have warned that any escalation that threatens energy supplies could exacerbate the cost‑of‑living crisis for workers.

At the same time, the EU's own energy diversification strategy, increasing imports of liquefied natural gas, expanding renewable capacity and reducing reliance on Russian oil, gains urgency. The European Commission has repeatedly called for solidarity among member states to shield consumers from price spikes that could follow further Russian destabilisation.

Sanctions, diplomacy and the road ahead

Western sanctions have not yet compelled Moscow to the negotiating table. The Kremlin frames Ukrainian strikes on storage facilities and refineries as attacks by NATO members, arguing that Western arms supplies and intelligence make Kyiv a proxy for the Alliance. This narrative fuels Moscow's justification for a harsher response.

Diplomatic channels remain open, but the recent US warning underscores the fragility of the situation. If Russia were to launch a limited attack on a Baltic state, the NATO Article 5 clause could be triggered, obliging all members to consider a collective defence response. Such a scenario would dramatically raise the stakes for European security and could force a rapid escalation of defence spending across the continent.

For now, analysts like Alexander Gabuev of the Carnegie Centre argue that Putin is more likely to continue escalating with conventional weapons rather than resort to nuclear force, as long as he can achieve his objectives without crossing that line. Yet the very discussion of tactical nukes within the Kremlin's inner circle signals a dangerous shift in rhetoric that European policymakers cannot ignore.

European governments are therefore balancing two imperatives: maintaining a credible deterrent posture while avoiding actions that could be interpreted as provocation. The EU's recent decision to increase funding for civilian‑military cooperation and to bolster cyber‑defence capabilities reflects this dual approach.

In the coming weeks, the focus will be on whether Moscow issues a formal declaration of mobilisation, how the West responds to the CIA director's warning, and whether any concrete steps are taken to protect the Baltic airspace. The outcome will shape not only the trajectory of the war in Ukraine but also the security calculus for the entire European continent.