Arrest made after suspicious letter sent to the White House

A woman crossing into the United States from Canada has been arrested following reports of a suspicious letter being sent to the White House.

CNN and NBC News reported that an arrest had been made, per their sources.

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.