Update: Monday October 19,2:43pm:

The situation is over. The backpack only contained sand.
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The Alachua County bomb squad was called out Monday after a suspicious package was found at the student union.

University Police say they found a backpack taped shut, that was left in a loading dock at the University of Florida Reitz Student Union.

The Alachua County Bomb Disposal Unit is at the scene. No one has been injured.

Around 1:45pm today, authorities told TV-20 that they opened the bag. There is white powder in it. So a hazardous material team has come to the scene.