ABC News is reporting the FBI’s Denver field office has sent a letter to farm supply stores in its region warning employees to be aware of anyone who might be acting in a way that could indicate potential terrorist activity.
“Current trends in terrorist bombings show that fertilizer-based explosives are continuing as a threat throughout the world,” the letter states. “Ammonium nitrate and urea-based fertilizers pose an explosive threat if prepared and initiated properly. In addition, certain pesticides can be used to cause widespread harm to people.”