A Michigan woman is behind bars in the latest security breach at the White House.  And officials say April Lenhart of Mount Morris near Flint, is refusing to say why she was there and why she had a gun on her person.

MSN.com is reporting today that the 23-year-old woman was arrested around 8:30 last night, while President Obama was delivering his speech on immigration reform.

She was seen near the north fence of the White House complex with a weapon holstered on her hip.   There is no word yet on just what kind of a gun it was but Lenhart was arrested for possession of an unregistered firearm and carrying without a license.

Lenhart is refusing comment on why she was at the facility or what she planned to do with the gun.

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