Ukraine hit the Moscow refinery, the largest refinery in the Russian capital, and debris from downed Ukrainian drones sparked a blaze at a major Russian oil refinery on Sunday. President Vladimir Putin said Russia is going through a difficult period.

According to Al Arabiya, Ukraine also hit two Russian oil refineries in the Krasnodar and Yaroslavl regions overnight, and a fire broke out at the Slavyansk‑na‑Kubani refinery in Krasnodar region, killing one person and injuring another.

Bluesky reported that the Moscow refinery supplies about 70 % of Moscow and its regions’ fuel and up to 40 % of Russia’s total fuel market. DW noted that Russia’s fuel output is falling after Ukrainian drone strikes on refineries. GDELT said President Vladimir Putin acknowledged that Russia was facing a certain deficit of fuel, and also reported that Ukrainian President Volodymyr Zelensky wrote on Telegram that Ukraine’s “long‑range sanctions” reached two oil refineries in Russia.

The Hindu described the strikes as a campaign to pressure Moscow to end the war by undermining its military logistics and supply lines. The Kyiv Independent reported that Gazprom’s Omsk Oil Refinery is approximately 2,445 km (1,519 mi) from Ukrainian‑controlled territory. Meduza stated that by the end of May 2026, no major refinery in the European part of Russia had escaped a Ukrainian drone attack and that many Russian refineries have been hit multiple times. The New York Post said the strikes forced plants to cut or halt production, creating a large‑scale fuel crisis across Russia. The South China Morning Post reported that Ukrainian drones set fire to a major oil refinery in the south, killing at least two people, and The Moscow Times noted that Ukrainian drones struck the Afipsky oil refinery in Russia’s Krasnodar region for the second time in a month.