Media: Drones attacked Russia's Volgograd oil refinery, Kaluga oil depot, Lipetsk steel mill - Euromaidan Press
Drones Target Russia's Largest Oil Refinery in Kaluga Region, Igniting Fire - Kyiv Post
Source: Military intelligence drones strike oil refinery in Russia's Kaluga Oblast - MSN
Russian oil refinery in Kaluga region attacked as part of Ukraine's intelligence operation, sources - MSN
Strike on a refinery in the Kaluga region: Russian authorities confirm UAV attack and fire - gagadget.com
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