The incident occurred in Ulster County on Monday, Nov. 4, at the State Department of Environmental Conservation, targeting the DEC Region 3 office in New Paltz.
According to Trooper Steven Nevel, troopers searched the building and did not find any explosive devices.
The investigation into the threat is ongoing.
Anyone with information about this incident is asked to contact Troop F Headquarters at 845-344-5300.
Click here to follow Daily Voice Mount Sinai and receive free news updates.