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Hacking group Anonymous has declared 'cyber war' against Vladimir Putin's government after he mounted a full-scale invasion of Ukraine.
The elusive computer experts issued the stark announcement on their Twitter account on Thursday evening.
They said shortly before 10pm: 'The Anonymous collective is officially in cyberwar against the Russian government.'
Around 30 minutes later, they announced that they had taken down the website of the Kremlin-backed TV channel RT, which broadcasts in Britain and has been heavily criticized for its coverage.