Ukrainian drones reportedly target Russian oil depot in Voronezh Oblast, gunpowder factory in Tambov Oblast - State of emergency declared in Kotovsk, Tambov region, after drone attack - Seven people injured in drone attack on Russia's Tambov region - Drone attack injures seven people in Russia's Tambov Oblast - Governors of Russia's Rostov, Tambov Regions Resign, Kicking Off Regional Shake-Up - Putin taps former Krasnodar mayor for Tambov governor's seat after volunteer military service in Ukraine - Rescuers found body of fifth victim of gas blast in Tambov region -- Emergencies Ministry - Household gas explosion kills four in Russia's Tambov Region - Two killed in gas explosion in apartment building in Tambov Region - Two Russian oil depots on fire in Russia's Tambov Oblast and Adygea after drone strikes (video)