The Daily BriefMorning Briefing · Thursday 4 June 2026 · 04:00 BST
Morning Briefing · Thursday 4 June 2026

Ukrainian Drones Hit St Petersburg Oil Complex and Military Base as “Russian Davos” Opens

Ukrainian drones hit an oil complex and a military base in Saint Petersburg overnight Tuesday-Wednesday as the St Petersburg International Economic Forum 2026 — widely known as “Russian Davos” — opened in the city with ministers and officials gathering. President Volodymyr Zelensky confirmed the strikes Wednesday; the drones flew approximately 1,000 km to reach their targets. The strike is calibrated for maximum diplomatic embarrassment of the Kremlin during its flagship annual economic event. ISW reports the Russian ultranationalist community presented extreme and unrealistic scenarios for Russia’s military and geopolitical future at the SPIEF.

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The St Petersburg International Economic Forum (SPIEF) is the Kremlin’s flagship annual economic-diplomatic event, designed to showcase Russian openness to foreign investment despite Western sanctions. A Ukrainian drone strike on the host city’s oil terminal AND a military base during the forum is calibrated for maximum embarrassment. Ukrainian deep-strike operations against Russian refining and storage infrastructure have measurably affected Russian fuel availability through 2026. The strike follows the weekend hits on the Saratov Oil Refinery, a Caspian military base and a Rosneft refinery. The ISW SPIEF read — Russian ultranationalist community pushing extreme scenarios — indicates internal Kremlin pressure to escalate rather than negotiate.

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