A number of tweets posted by the @bbcweather Twitter account relating to Syria and the Middle East have since been deleted.
A group calling itself the Syrian Electronic Army is claiming responsibility for hack.
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Witnesses reported hearing a "huge bang" at the venue during the concert on Monday evening.
ITV News travels to Britain's eastern-most city to gauge how the electorate will be casting its votes.
Carefully choreographed campaigns can become unstuck because voters have the power to peel back a politician's veneer.