MOSCOW (Reuters) -Authorities in Russian-controlled Crimea said on Friday they were introducing an information blackout designed to counter Ukrainian drone, missile and sabotage attacks. Sergei Aksyonov, the head of Crimea - which Russia annexed from Ukraine in 2014 - said he had signed a decree banning media outlets and social media users from publishing any photos, video or other content that revealed the location of Russian forces or details of Ukrainian attacks on the Black Sea peninsula. "The relevant decree was adopted to safeguard public security and military and other important facilities in the republic," Aksyonov said in a statement on Telegram.