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				Russia's ties with Turkey suffered a severe blow when a Turkish 
				fighter shot down a Russian bomber near the Turkish-Syrian 
				border in November, a move described by Russian President 
				Vladimir Putin as "a stab in the back". 
				 
				Minister Nikolai Nikiforov's Instagram account was blocked by 
				"The Börteçine Cyber Team" hackers, according to screenshots of 
				the account, published by Russian and Turkish media and 
				featuring Turkish flags, a portrait of Turkey's founding father 
				Mustafa Kemal Ataturk, and a warplane. 
				 
				Instagram, where users post their pictures and videos, later 
				restored Nikiforov's account and his profile photo, but the 
				minister complained that the technical support team had not 
				reacted to the incident for more than nine hours. 
				 
				Putin said he saw no way of improving ties with Turkey's 
				leadership, while Moscow imposed economic sanctions on Ankara. 
				 
				Turkish media reports suggested in late December that Russian 
				hackers could be behind recent cyberattacks on Turkish internet 
				servers handling more than 300,000 websites. 
				 
				On Dec. 25, Turkish banks reported sporadic disruption to credit 
				card transactions, with local media repeating suggestions that 
				the bombardment of public and financial websites could be coming 
				from Russia, or staged by hacking group Anonymous. 
				 
				(This story has been refiled to restyle headline) 
				 
				(Reporting by Dmitry Solovyov; Additional reporting by Nick 
				Tattersall in Istanbul; editing by Ralph Boulton) 
				
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