Flight restrictions briefly imposed in Russian Volga area city of Kazan - Restrictions on operation of Russia's Ulyanovsk, Kazan airports lifted - Drones target Russian military aircraft plant in Kazan - Multiple airports suspend flights as Russia's Kazan comes under drone attack - FACTBOX: Attempted UAV attack on enterprises in Kazan - Industrial facilities in Russia's Kazan come under drone attack - Kazan boasts necessary sports facilities to host BRICS Winter Games -- mayor - Huge Fire Erupts at Kazan Gas Site After Ukrainian Drone Attack - Kazan airport in Russia's Tatarstan suspends service -- regulator - Flights suspended at Russia's Sochi and Kazan airports