The Syrian Electronic Army has claimed responsibility for hacking the Twitter accounts of FIFA president Sepp Blatter and the official FIFA World Cup account.
The group previously claimed hacking the Twitter accounts of CBS, BBC Weather, BBC Radio Ulster, BBC Arabic Online and 60 Minutes.
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A 21-gun salute was first sounded in the capital, Havana, as Castro's ashes were taken to the cemetery in eastern Cuba.
At least three children and 18 others - including members of the local police force - were among those who died.
The Foreign Secretary was unable to rule out the possibility of continuing to pay money into the EU when he spoke to Peston On Sunday.