A Ukrainian drone attack struck Russia's Rosneft Ryazan oil refinery in Ryazan on October 23rd, 2025, causing a fire at the facility. The attack occurred following the U.S. imposition of economic sanctions on Russia's Rosneft Oil Company yesterday. The refinery is described as one of the largest in the country. This development follows overnight explosions reported in the Dyagilevo area of Ryazan and in Pavlograd between 12:32 AM and 1:32 AM UTC on October 23rd, 2025. These incidents coincided with a Ukrainian source's assertion that recent U.S. sanctions on "Rosneft" and "Lukoil" would trigger a collapse in key sectors of the Russian economy. On October 23rd, 2025, between 11:02 PM and 12:02 AM UTC, President Donald Trump unequivocally denied authorizing Ukraine to conduct missile strikes inside Russia, calling a Wall Street Journal report "fake news." This statement was made amidst reports of air raid alerts for six UAVs traversing the Konotop district of Sumy Oblast, Ukraine. Previous reports from October 22nd, 2025, detailed U.S. sanctions imposed on subsidiaries of Russian energy firms Lukoil and Rosneft as a response to Russia's continued refusal to pursue peace in Ukraine. During that earlier period, explosions were reported in Kamianske, Ukraine, and at a plant in Kopeisk, Russia, where the death toll eventually rose to nine.