Ukraine reports strike sets Russian warship ablaze at Baltic Fleet Kronstadt base

What happened

The Kyiv Independent reports that Ukraine's Unmanned Systems Forces (USF) claim to have hit a Russian missile-armed corvette, the Boikyi, at the Kronstadt naval base in Russia's Leningrad Oblast on June 3. USF commander Robert Brovdi stated on Telegram that drones tracked and set the ship on fire. The vessel is noted for its previous escort of Russia's so-called shadow oil fleet through the English Channel in 2025.

The central claim remains unconfirmed in the supplied material and should be treated as hearsay until corroborated by another reliable source or a named official. President Volodymyr Zelensky and Ukraine’s General Staff confirmed that military targets at Kronstadt, alongside other sites within Russia and Russian-occupied Ukraine, were struck on June 3. Leningrad Oblast Governor Aleksandr Drozdenko reported that 50 drones were shot down over the region on the same day, indicating a significant level of drone activity and air defense response.

Concurrently, Ukraine struck the St. Petersburg Oil Terminal, a major fuel storage and export hub, located approximately 1,100 kilometers from Ukraine’s border. This attack coincided with the opening day of the 2026 St. Petersburg International Economic Forum, hosted by Russian President Vladimir Putin. Black smoke reportedly hung over the city as the conference began, underscoring the symbolic nature of the strike.

Known from the source

• Ukraine's USF claims to have hit the Russian corvette Boikyi at Kronstadt naval base with drones on June 3.
• Ukraine's President Zelensky and General Staff confirmed strikes on military targets at Kronstadt and other sites in Russia and Russian-occupied Ukraine on June 3.
• Leningrad Oblast Governor reported 50 drones shot down over the region on June 3.
• Ukraine struck the St. Petersburg Oil Terminal on the morning of June 3 during the opening of the St. Petersburg International Economic Forum.
• John Foreman described the strikes as humiliating for Putin’s home city and damaging to Moscow's narrative of strength.

What remains unclear

John Foreman, former UK Defense Attaché to Moscow and Kyiv, told the Kyiv Independent that the strike was particularly humiliating for Putin’s home city and disrupted Moscow’s narrative of strength during a flagship economic and political event. Foreman linked the attack to a series of setbacks for Putin, including subdued Victory Day celebrations and Ukrainian strikes affecting Russian logistics and Crimea.

What remains unclear: Confirm whether the central claim is corroborated; until then treat it as unconfirmed/hearsay. Whether the Boikyi corvette was physically set on fire and extent of damage caused in the strike. Independent confirmation of damage and operational impact on the St. Petersburg Oil Terminal. Verification of the number of drones involved and their successful engagement/defense by Russian forces.

Evidence note

This story contains report-led claims. The article keeps those claims attributed and treats them as unconfirmed/hearsay unless independently corroborated.

Original source: Kyiv Independent. Open the source.