Ukrainian forces carried out coordinated overnight strikes deep inside Russian territory, damaging a missile corvette in Lake Onega that carries Kalibr cruise missiles, according to the General Staff of the Armed Forces of Ukraine.
At 04:31 a.m. on October 4, 2025, Ukrainian Special Operations Forces struck the missile corvette Grad in Lake Onega, Karelia—approximately 980 kilometers from Ukraine’s border. The attack reportedly hit the vessel’s power plant compartment on the starboard side.
“The missile carrier was en route from the Baltic to the Caspian Sea,” the General Staff said in its statement.
The Grad (hull number 575) is one of Russia’s newest Project 21631 Buyan-M corvettes, commissioned into the Baltic Fleet on December 29, 2022. The ship is armed with the Kalibr-NK cruise missile system, which Russia has used in repeated strikes against Ukrainian cities.
The Lake Onega strike was part of a wider Ukrainian operation overnight. Ukrainian Defense Forces also targeted the Kirishinefteorgsintez refinery in Kirishi, Leningrad Oblast, where explosions and fires were reported. The refinery, one of Russia’s largest, processes around 18.4 million tons of crude oil annually.
In separate operations, Ukrainian forces destroyed a Garmon radar complex and a transporter-loader vehicle from an Iskander short-range ballistic missile system in Kursk Oblast. They also struck a command post belonging to Russia’s 8th Army in occupied Donetsk Oblast.
Russian Telegram channels confirmed the Lake Onega incident, emphasizing that the location lies nearly 1,000 kilometers from Ukrainian territory.
Since the start of Russia’s full-scale invasion, Ukraine’s Defense Forces have maintained a systematic campaign to degrade Russia’s military infrastructure and economic capacity—targeting logistics hubs, fuel facilities, ammunition depots, and weapons production sites.
