Ukraine's Deputy Prime Minister Pavlo Rozenko said that the government's computer network was down, in what he claimed was a "massive cyberattack", one which claimed the central bank, power plant and airport, and promptly accused Russia of being behind it.
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http://www.zerohedge.com/news/2017-06-27/ukraine-central-bank-government-airport-go-dark-after-massive-cyberattack-russia-bla