Hackers cause disruption in several European countries    

Cyberattacks in Ukraine, Denmark and Russia, among others, target companies, banks and government offices.

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Major global companies hit by cyber attacks www.rt.com
Danish shipping and oil firm A.P. Moller-Maersk has reported its computer systems crashed as a result of a cyber attack on Tuesday. The company called it a global issue.

Petya cyber attack: Ransomware spreads across Europe with firms in Ukraine, Britain and Spain shut down www.telegraph.co.uk
Major firms, airports and government departments in Ukraine have been struck by a massive cyber attack which began to spread across Europe on Tuesday afternoon.