Various websites associated to the World Cup have been struck by a distributed denial of service (DDoS) attack ahead of the tournament's opening match on Thursday.
The official government World Cup website has been down for more than a day, as well as the websites of some host states. Hacking collective Anonymous has claimed responsibility for the attacks.
The hacker group has published a list of over 60 websites that have successfully taken down and are still offline at the time of writing, including as the Brazil website of recording giant Universal Music.
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