The U.S. Capitol Police are investigating a suspicious package with a powdery substance that was found at the office of Sen. Max Baucus.
The Montana Democrat is chairman of the Finance Committee and a leader in the Senate's health care debate.
Police spokeswoman Kimberly Schneider said there were no reports of illness. Schneider said the substance is being tested.
An Associated Press photographer at the scene, in the Hart Senate Office Building, heard officers say there was a threatening note with the package. Schneider would not confirm there was a note.
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