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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Nearly 38,000 runners will hope to complete Sunday's London Marathon making it the biggest event in its 35-year history.
Rain across central Britain with longer, intense downpours with thunder in places this evening. A lucky few will stay sunny and dry.
Planning on going to the London Marathon tomorrow? Read our handy guide first!