In a significant escalation of the ongoing conflict between Ukraine and Russia, Ukrainian forces launched long-range drones to strike an oil refinery in Nizhnekamsk, a major petroleum hub located approximately 1,200 kilometers east of the Ukrainian border. The attack resulted in the death of 13 individuals and injured 75 others, according to local authorities in the Tatarstan region. This is one of the deadliest attacks in Russia since the beginning of the four-year-old war. The targeted refinery is home to two oil refineries and a petrochemical plant, raising concerns about potential disruptions in energy production and supply chains. Ukraine has been targeting Russian oil facilities with long-range drones almost daily in recent months as part of a larger campaign aimed at destabilizing Russia's energy sector. This strategy has caused fuel shortages, reduced refining capacity, and unsettled the population within Russia. On Monday, several Ukrainian drones also sparked a fire at an industrial facility in the Tyumen region of western Siberia. Ukrainian President Volodymyr Zelenskyy asserts that his country's objective is to force Russian President Vladimir Putin to negotiate and end the full-scale invasion launched in 2022. The ongoing conflict has resulted in thousands of civilian casualties, according to the United Nations, and has caused widespread destruction in Ukraine. The World Health Organization's European office reported that one of its warehouses in central Ukraine was hit twice in less than 24 hours, destroying emergency supplies worth an estimated $500,000 intended for front-line health facilities. Ukraine's domestically developed long-range drones have been flying increasingly longer distances deep inside Russian territory, with some now reaching Siberia. In response, Russia has regularly bombarded Ukrainian cities from the air using missiles, powerful glide bombs, and drones. As part of a parallel campaign to disrupt Russian military supply lines leading to the front line in eastern and southern Ukraine, Kyiv's forces have struck road, rail, and pontoon bridges in six regions over the past month. This strategy aims to slow down, increase the cost, and make it difficult for Russia to organize logistics for fuel, ammunition, and reinforcements, thereby stalling Russian advances and enabling Ukrainian counterattacks.