ISTANBUL  Azerbaijan Airlines (AZAL) on Wednesday announced that it has suspended all of its flights between the Azerbaijani capital Baku and the Russian city of Kazan for an indefinite period. “Due to the recent regular closure of airspace over the Russian city of Kazan AZAL is indefinitely suspending all flights en route Baku-Kazan-Baku to ensure flight safety,” said a statement by the company on Telegram. The statement said that passengers who have bought tickets to fly between the two