WASHINGTON: Crashing a state dinner at the White House apparently takes a security breakdown as well as some kind of nerve.

The Secret Service is looking into its own security procedures after determining that a Virginia couple, Michaele and Tareq Salahi, managed to slip into Tuesday night's state dinner at the White House even though they were not on the guest list, agency spokesman Ed Donovan said.

President Barack Obama was never in any danger because the party crashers went through the same security screening for weapons as the 300-plus people actually invited to the dinner honoring Indian Prime Minister Manmohan Singh, Donovan said.