Ukraine has struck Russia’s largest oil-loading port on the Baltic Sea, triggering fires and fuel leaks at the strategically vital Primorsk terminal in the Leningrad Region, in one of the deepest attacks inside Russian territory this year.
The overnight drone strike, reported late on April 4 and into April 5, hit oil-handling infrastructure at the port of Primorsk, a key export hub for Russian crude and petroleum products.
Russia’s regional authorities confirmed damage at the facility, while satellite data from NASA’s Fire Information for Resource Management System, known as FIRMS, detected active fires within the port’s territory.
Primorsk lies between Saint Petersburg and the Finnish border and serves as the final outlet of the Baltic Pipeline System, through which millions of tonnes of Russian oil flow to global markets each year.
It is widely viewed as one of the Russia’s most important energy export points and a major source of foreign revenue funding the war in Ukraine.
Russian officials said air defenses were activated during the attack, but debris and drone strikes caused fuel leaks and fires in the port area.
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Satellite images showed smoke rising from oil storage zones at Primorsk, confirming that the impact extended beyond isolated debris damage.
Fire Confirmed from Space
Independent confirmation of the strike came from NASA FIRMS, a satellite-based monitoring system that tracks heat signatures from fires and explosions across the globe.
The system detected multiple thermal anomalies directly inside the Primorsk port perimeter, indicating active burning at oil-handling facilities.
Fires detected by FIRMS were located within the oil depot and petroleum transshipment zones, rather than surrounding fields or forests.
This suggested that the port’s industrial infrastructure had been affected.
Ukrainian military-linked monitoring channels said the fires involved areas used to handle light petroleum products such as diesel, gasoline, and aviation fuel.
These products are typically more valuable than crude oil, making damage to such facilities especially costly.
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While Russian officials initially described the incident as limited, follow-up reports indicated that the fire detected by satellites was consistent with damage to the port’s energy infrastructure rather than a secondary blaze from falling debris.
A Growing Ukraine Campaign against Russian Oil Exports
The Primorsk strike forms part of Ukraine’s expanding campaign to hit Russia’s oil and fuel infrastructure far from the front lines.
In recent months, Ukrainian long-range drones have increasingly targeted refineries, pipelines, and export terminals that are critical to Moscow’s war economy.
On the same night, Ukrainian drones also struck an oil refinery in Russia’s Nizhny Novgorod region, causing a separate fire, according to Russian authorities.
The coordinated nature of the attacks points to a broader effort to strain Russia’s fuel supply and reduce export revenues.
Primorsk is Russia’s largest oil port on the Baltic Sea, handling an estimated 60 million tonnes of oil annually.
It is also linked to the transport of oil shipped by tankers that Western officials say are used to bypass international sanctions.
Any suspension of loading operations would affect oil shipments to Europe and Asia and put pressure on Russia’s already stretched energy infrastructure.
The strike also underlines Ukraine’s growing ability to reach targets more than 1,000 kilometers from its borders, challenging Russia’s air defenses in regions previously considered relatively safe.
Russia’s Leningrad Region governor has acknowledged that the area is increasingly exposed to long-range attacks, as Ukrainian drones continue to penetrate deep into Russian territory.
For Ukraine, targeting ports such as Primorsk serves both military and economic goals, as it limits fuel supplies for Russian forces while eroding the export revenues that sustain the Kremlin’s war effort.
