A series of threatening letters containing a mysterious white powder is raising concerns that Republican lawmakers in Kansas who received them are being targeted by someone cryptically calling ...

A hazmat crew from the National Guard's Civilian Support Team investigates after a suspicious package was delivered to election officials at the Missouri Secretary of State's Jefferson City, Mo.

None of the mail has been deemed hazardous so far but it has caused evacuations. The FBI and Postal Service are investigating suspicious mail containing a white powder substance that was sent to ...