Ukraine launched overnight drone attacks on Russian energy infrastructure, damaging an oil pipeline near the Baltic port of Primorsk in Leningrad Oblast and striking facilities deeper inside the country, according to regional authorities.

Russian officials said debris from 19 intercepted drones fell near the Primorsk area, causing damage to a pipeline linked to the port, a key export terminal for Russian oil shipments. No casualties were immediately reported, but the incident highlights the growing vulnerability of energy logistics infrastructure far from the front line.

NASA picked up on a massive fire at Primorsk oil port after a Ukrainian drone attach on April 4. At least eight storage tanks were believed to have been hit.

In a separate attack, Ukrainian drones reportedly struck a refinery and a thermal power plant in Nizhny Novgorod Oblast, an industrial region east of Moscow. The extent of the damage has not been independently verified, and Russian authorities have not disclosed the operational impact on output.

A fire broke​out at ‌Russia's Norsi oil refinery, the ​country's fourth-largest, ​after a drone ⁠attack, the ​governor of Nizhny ​Novgorod region, Gleb Nikitin, said on ​the Telegram ​messaging app on April 5 following a Ukrainian drone attack.

He ‌also ⁠said a power station and several ​houses ​were ⁠damaged during the attack. ​There were ​no ⁠injured, according to preliminary ⁠information, ​he ​added.

Ukraine reportedly strikes Russian Lukoil refinery, defying calls to ease attacks amid soaring fuel prices. Ukrainian drones struck a Lukoil oil refinery in the Russian city of Kstovo overnight on April 5, Russian Telegram media channels reported.

Russian officials in Nizhny Novgorod Oblast and Leningrad Oblast said that Ukrainian drones caused damage to refining facilities and an oil pipeline.

“Last night, air defense forces repelled an attack by 30 enemy drones. As a result of the falling debris, two facilities of (the Lukoil-Nizhegorodnefteorgsintez refinery) were damaged," Gleb Nikitin, the governor of Nizhny Novgorod Oblast, said on April 5, according to Russian Telegram channel ASTRA, the Kyiv Independent reported. 

The strikes form part of a broader Ukrainian campaign targeting Russian energy assets, which Kyiv has framed as retaliation for sustained Russian attacks on Ukraine’s own energy grid since the start of the full-scale invasion in 2022. Moscow has repeatedly targeted Ukrainian power generation and transmission infrastructure, leading to widespread outages during winter months.

The latest incidents suggest Kyiv is continuing to expand the geographic reach of its drone operations, increasingly hitting infrastructure critical to Russia’s oil exports and domestic energy supply. Analysts say such attacks aim to impose economic costs on Russia while complicating logistical support for its military operations.

Primorsk is one of Russia’s largest oil export terminals on the Baltic Sea, handling significant volumes of crude shipments to international markets. Any disruption, even temporary, could have implications for supply flows, although global oil prices have so far shown limited response to similar incidents.

Russian air defence systems have intercepted increasing numbers of Ukrainian drones in recent months, but falling debris has become a recurring risk to industrial sites and civilian areas alike.