The ZSU-23-4 'Shilka' anti-aircraft system has been upgraded to the ZSU-23-4M1-A1 level by the 'Come Back Alive' Foundation and entered service with the anti-aircraft artillery division of Ukraine's 13th 'Khartia' Brigade of the National Guard, according to a front_ukrainian post on X at 8:16-8:46 PM UTC on February 20, 2026. The upgrade was announced in the 29-minute reporting window, marking a modernization effort for Ukrainian air defense capabilities amid ongoing conflict, as stated by the Ukrainian front_ukrainian account. No specific deployment location or operational details were provided in the post. Separate X posts during this period reported a low-flying object over the occupied part of Donetsk region, per @sgorlovki, and commentary on Russian strategic infrastructure as legitimate targets from @LilithLovett, without official attribution or verification. These developments follow UAV fragments damaging a gas pipe and igniting a fire in Krasnodar, Russia, as reported by the mayor to TASS in the prior hour, and alerts in southern regions including Berdyansk and Crimea.
