A woman crossing into the United States from Canada has been arrested following reports of a suspicious letter being sent to the White House.
The arrest was made at the Peace Bridge in Buffalo, NY, Scripps station WKBW learned through a source.
On Saturday, the FBI confirmed that it was joining the USPS and Secret Service in a joint investigation of a suspicious letter addressed to a government facility. Letters addressed to the White House are screened off site before reaching the complex.
CNN reported that the letter contained ricin.