Ukrainian drone strikes hit St. Petersburg oil assets during Putin’s economic forum.

Ukrainian drone strikes cast a shadow over President Vladimir Putin’s annual economic forum in St. Petersburg, with smoke and fire from an attack on the city’s outskirts underscoring the strain the war is putting on Russia’s economy and energy system. The timing was especially awkward for the Kremlin, which uses the forum to project confidence and resilience, even as a senior Russian diplomat in London acknowledged that the war has “cost a lot.”

According to the Independent’s live coverage, the Russian envoy said Moscow “cannot lose this war” while conceding that Ukrainian attacks have caused major damage to Russian oil infrastructure. That admission fits a broader pattern described by other reporting, which says Ukraine has increasingly focused its strikes on Russia’s energy assets in an effort to weaken the revenue stream that helps finance the invasion.

The drone strike in St. Petersburg helped set a bleak tone for what some observers call “Russian Davos,” the Kremlin’s flagship investment showcase. The Independent reported that a large black cloud rose above the city skyline after the attack, creating a vivid contrast with the polished image Putin typically tries to present at the forum. While Russian officials have long portrayed the event as evidence that the country remains open for business, the strike highlighted the vulnerability of even major urban centers far from the front line.

The broader campaign against Russian oil infrastructure has intensified in recent weeks. CBS News reported that Ukrainian drones hit key Russian oil facilities, including the Baltic Sea port of Primorsk and tankers linked by Kyiv to sanctions evasion, in what Ukraine says is a deliberate effort to reduce Russia’s ability to export oil and earn war revenue. Together, the Baltic ports targeted in that reporting account for a significant share of Russia’s oil exports, making them strategically important.

That strategy has also widened the political and economic pressure on Moscow. Ukrainian officials argue that oil income directly funds Russia’s full-scale invasion, now in its fifth year, while Russian officials have increasingly had to address the cost of the war in public, even as they insist they can prevail. The envoy’s remarks in London, as described by the Independent, suggest that Moscow is aware of the burden but remains unwilling to signal any retreat.

The strikes also come as both countries continue to exchange attacks on infrastructure. CBS News reported that Russia launched a large wave of drones and ballistic missiles at Ukraine overnight, while Ukraine’s air defenses intercepted most of them. The back-and-forth underscores how the war is increasingly being fought not only on the battlefield, but also against economic and logistical targets designed to erode each side’s capacity to sustain the conflict.

For Russia, the immediate significance is twofold: the drone attack exposed the limits of domestic security, and the forum meant to advertise stability instead became a reminder of wartime disruption. For Ukraine, the strikes appear aimed at making the economic costs of the invasion harder for the Kremlin to absorb, even if they do not yet force a change in strategy.