(Reuters) -The Russian-installed governor of the Crimean city of Sevastopol said on Saturday that air defences had shot down a drone in what he suggested was the latest attempted Ukrainian attack on a port where Russia’s Black Sea Fleet is based. Mikhail Razvozhaev, the Russian-backed governor of the city, made the accusation on the Telegram messaging service, alleging that the incident had occurred in the early hours of Jan. 7, which is Orthodox Christmas. “Even the sacred holiday of Christmas was not a reason for these inhuman people to halt their attempts to attack our Hero City,” Razvozhae…