Ukrainian drones struck a handful of Russia's oil facilities overnight, including two oil refineries in the Samara region and a Baltic Sea port that exports petroleum products, Russian local governors and a Ukrainian army official said.
Ukrainian troops have in recent weeks stepped up attacks on Russian oil depots and refineries - key sources of revenue for Moscow's war budget - sometimes targeting sites thousands of kilometres from Ukraine's borders.
In the Leningrad region, which surrounds St Petersburg and borders Finland, Governor Alexander Drozdenko said a fire had been extinguished at the Vysotsk port, which houses a terminal operated by Lukoil handling exports of fuel oil, naphtha, diesel and vacuum gas oil.
In a statement on the Telegram messaging app acknowledging the port attack, Ukraine's drone forces commander, Robert Brovdi, said Ukrainian forces also attacked oil refineries in the cities of Novokuibyshevsk and Syzran in the Samara region.
Both sites have been repeatedly struck in the course of Russia's war in Ukraine.
"Make Russian Oil Great Again," he wrote sarcastically.
He also criticised the US decision to renew a waiver allowing countries to buy sanctioned Russian oil at sea.
Vyacheslav Fedorishchev, the Samara region governor, said industrial targets came under strike. He did not name the facilities.
According to Commander Brovdi, a series of recent strikes on Russia's oil logistics at Primorsk, Ust-Luga, Sheskharis, Tuapse reduced total daily oil shipments by about 880,000 barrels. Reuters could not immediately verify the figure.
An oil depot in Russian-occupied Sevastopol in Crimea also came under attack, Cmdr Brovdi said.
Separately, authorities in the southern Krasnodar region said that a fire at an oil depot in Tikhoretsk, and another at an oil terminal at the Black Sea port of Tuapse, which had burned since Thursday, have been extinguished.
Both fires, authorities have said, were caused by Ukrainian drone strikes.
