MOOSE, Wyo. (AP) - A suspicious letter sent to Grand Teton National Park did not contain a hazardous substance, the state health department has determined.
On Thursday, park employees opened a letter that contained an unknown substance. Teton County's hazardous materials specialists and an FBI agent responded. Five employees working in the office were evacuated.
Although initial investigations deemed the substance non-hazardous, they sent the letter to the Wyoming Department of Health laboratory in Cheyenne.
