The package was left at the airport mail center and contained a letter that said water supplies would be contaminated if the Hours of Services ruling was not repealed.
The Trucking Information Sharing and Analysis Center (Truck ISAC), operated by American Trucking Associations, noted in a briefing on its web site:
“Because of a recent threat directed against the U.S. Department of Transportation claiming to be from someone in the trucking industry, the Trucking Information Sharing and Analysis Center requests the industry be alert for either a potential disgruntled trucking company, trucking company employee or person purporting to be from the trucking industry who may be or has in the recent past made threatening statements or displaying suspicious or aggressive actions regarding the U.S. Department of Transportation, specifically the Federal Motor Carrier Safety Administration.”