The US Secret Service is investigating reports that a couple gatecrashed Tuesday night's state dinner at the White House, US media say.
Tareq and Michaele Salahi were reportedly not invited but later posted photos of themselves on Facebook.
Secret Service spokesman Ed Donovan said the pair were screened and the president was never in any danger, but former FBI agent Brad Garrett described the incident as a "real concern."
The Washington Post described the Salahis as "polo-playing socialites" with Ms Salahi said to be on the cast of the Real Housewives of Washington television programme.
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