No new verified military or defense developments occurred between 2:16:10 PM and 2:46:01 PM UTC on February 26, 2026, according to sources reviewed in the 29-minute reporting window. Kursk regional operational headquarters had announced an air threat alert across Russia's Kursk Region at 2:16 PM UTC, putting forces on high alert. New sources from Exilenova+ and CyberBoroshno provided additional details on a prior Ukrainian drone strike on the Dorogobuzh fertilizer plant in Russia's Smolensk region on February 25, 2026, targeting ammonium nitrate production facilities, storage warehouses, and transportation sections, resulting in chain explosions that destroyed an overpass and damaged nearby units. CyberBoroshno reported the site produced about 10% of Russia's ammonium nitrate in 2024, with coordinates 54.9478600, 33.3679639. Exilenova+ shared video of a Shahed drone downed by an AN-28 crew using an M134 Minigun with laser targeting, per nexta_tv on X. These new sources confirm extensive prior damage at Dorogobuzh reported in previous updates, where the facility was described as rendered inoperable. Ukrainian Signum battalion drone strikes on Russian logistics in the Lyman direction and enemy infiltration attempts amid logistics shortages were noted earlier at 2:16 PM UTC by Дикі шершні and Говорять Снайпер.