On Monday, suspicious envelopes containing a white powdery substance were received by six governors around the country - including Alabama, Michigan, Mississippi, Missouri, Montana and Rhode Island. The six governors addressed by the letters are split politically: four Republicans and two Democrats.

Due to these letters, state governments were disrupted in a few of the states, forcing some evacuations and testing for workers who might have been exposed. No one was injured, and initial testing indicated the unknown substance was not dangerous.

Reports from different states have been received.

In Rhode Island, the letter, without a return address, was opened by statehouse staffers in Gov. Don Carcieri's Office of Constituent Affairs on Monday at about 3:45 p. m.

Mississippi, Gov. Haley Barbour's communications director, Buddy Bynum, said that in Jackson, a letter arrived Monday with "some sort of powdery substance."

In Lansing, Michigan, a package addressed to Gov. Jennifer Granholm was spotted about 2 p. m. at a state office building across the street from the Capitol.

Authorities evacuated the state Capitol in Helena, Montana, after finding a letter addressed to Gov. Brian Schweitzer. The building was evacuated and employees were sent home for the day.

In Jefferson City, Missouri, Highway Patrol spokesman Capt. Tim Hull said a suspicious letter was found at an offsite state mail distribution center. It never reached the state Capitol, which remained open and operating normally.

In Alabama, the letter with an unidentified ingredient was noticed by the mailroom workers in the basement of Alabama's Capitol, at about 12:30 p. m., after which the police was notified.

Christopher Murphy, Alabama's public safety director, said "my gut is there may be more" letters still moving through the mail system. However, Murphy did not say where the letters originated or whether they contained any political message.