Direct proof of use
The Tupolev Tu-141 Strizh is documented in the 2014 Russia-Ukraine War through physical incidents and reporting on Ukrainian long-range strike adaptations. Associated Press reported that Croatian investigators identified the drone that crashed in Zagreb on March 10, 2022 as a Soviet-era Tu-141 after it apparently flew from the Ukrainian war zone through Romania and Hungary into Croatia; Croatian officials also said it carried an explosive device.
Politico later reported that Ukraine used domestically modified Tu-141 surveillance aircraft in the December 5, 2022 strikes on the Russian Engels and Dyagilevo air bases. Defense Express described the Strizh as the first Ukrainian platform used to strike Russian Tu-95MS and Tu-22M3 bombers in winter 2022, while RFE/RL reported Russia's March 2023 claim that a Ukrainian Tu-141 Strizh drone was involved in the Kireyevsk attack in Tula region.
Sources: AP Zagreb Tu-141 bomb report, Politico modified Tu-141 airbase strike report, Defense Express Tu-141 bomber-base analysis, RFE/RL Tula Tu-141 claim
Dated milestones
The Strizh's Ukrainian reappearance began before the full-scale invasion. War Is Boring reported in June 2014 that Ukraine was restoring mothballed aircraft after Russia's seizure of Crimea and cited Ukrainian defense-ministry photographs that included a Tu-141.
The most visible 2022 milestones were outside Ukraine's front line. The Zagreb crash demonstrated that a Tu-141-class airframe had flown out of the Ukrainian war zone and crossed NATO airspace, though Croatian officials did not publicly settle whether the aircraft had been launched by Ukraine or Russia. In December 2022, Politico's reporting and later Defense Express analysis identified modified Ukrainian Tu-141s as an early deep-strike platform against Russian bomber bases.
Sources: Ukraine Resurrects Soviet-Era Super Drones, AP Zagreb Tu-141 bomb report, TWZ Croatia Tu-141 bomb analysis, Politico modified Tu-141 airbase strike report, Defense Express Tu-141 bomber-base analysis