WASHINGTON -

Authorities say that letters sent to President Barack Obama and Mississippi Senator Roger Wicker have tested positive for poisonous ricin, and NBC Montana has been in contact with the teams of Montana lawmakers in Washington to find out if their offices have been impacted.

Senator Jon Tester’s team tells NBC Montana that all incoming mail to their office goes to an off-site screening facility first, and that suspicious packages have not impacted the work in Tester’s office.

Senator Max Baucus’ team tells NBC Montana that his office is fully open, conducting business as usual, and staff have been given no reason to worry. A team member tells NBC Montana that Max takes the safety of his team and all Montanans visiting the Capitol very seriously, and that his office will continue following the direction of the Capitol police and supporting them in efforts to keep people safe.

Staff at Representative Steve Daines' offices tell NBC Montana that their offices in D.C. and Montana are open and working as usual, and that Daines takes seriously the safety and security of the Capitol, their office, and the Montanans that visit every day. Staff say mail will continue to be screened off-site before its arrival at the office, and that Montanans with questions and comments are encouraged to call and email the office.