Suspicious mailings to election officials, congressional offices under investigation

The FBI and U.S. Postal Inspection Service are looking into a series of suspicious mailings sent to state election officials and congressional offices. Officials say some of the mailings contained a powdery white substance.

It is not clear who sent the mail, which was sent to election officials in states including Louisiana, Ohio and Oklahoma as well as congressional offices. According to a statement from Louisiana Secretary of State spokesperson Trey Williams, an employee who opened a letter sent to the office on Tuesday was not injured but was taken to the emergency room as a precaution. Law enforcement found no evidence of harmful substances.

According to a communication from the Senate's Sergeant at Arms (SAA) to congressional staff and obtained by NPR, law enforcement officials are "working to intercept any additional letters before they are delivered, however, it is possible that some letters may reach their destinations."