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UPDATE: It turns out the suspicious package was a bunch of books that the unknown woman left for an agent who works in the building. The scene is being cleared.

JACKSONVILLE, FLA. -- A suspicious package left at the Jacksonville FBI building is being investigated by the Jacksonville Sheriff's Office bomb squad unit Sunday afternoon.

The package was dropped off by an unknown woman at the FBI security desk, according to JSO J.K. Lentz. He says the woman tried to drop the package off earlier when the FBI building located at 6000 Gate Parkway was closed.

JSO received a call at about 3:18 p.m.

Gate Pkwy is closed 200 yards north and south of the building.

The contents of the package are unknown at this time and every precaution is being taken, JSO says.