A Police Scotland spokesman has told STV: "Police at Edinburgh Airport have implemented a closure of the building and the access roads following the discovery of a potentially suspicious bag within the Central Search Area at around 1.50pm today.
"The EOD are currently in attendance to inspect the item and officers are maintaining a cordon to ensure the safety of the public."
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The slump will spark scrutiny, especially as statistics show a rise in racially or religiously motivated offences following the EU vote.
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Jordi Sanchez of the Catalan National Assembly and Jordi Cuixart of the Omnium Cultural group were jailed on Monday.