Michigan Sen. Carl Levin says his regional office in Saginaw received a suspicious letter and that authorities have been alerted.
Levin says that an aide received the letter Wednesday, but did not open it. Authorities are now investigating and the Sagniaw office has been evacuated.
The Democratic lawmaker says he and his staff do not know if the mail presented a threat.
Sen. Carl Levin, D-Mich., issued the following statement:
"Earlier today, a staffer at my Saginaw regional office received a suspicious-looking letter. The letter was not opened, and the staffer followed the proper protocols for the situation, including alerting the authorities, who are now investigating. We do not know yet if the mail presented a threat. I’m grateful for my staff’s quick response and for government personnel at all levels who are responding."
Separately, the FBI says a substance in letters sent to President Barack Obama and Mississippi Sen. Roger Wicker have preliminarily tested positive for ricin, a potentially fatal poison.
The FBI says those letters are related and are both postmarked out of Memphis, Tenn., dated April 8. Both letters were intercepted at off-site mail facilities.