India, March 14 -- The investigation into the disappearance of Nancy Guthrie, the 84-year-old mother of "Today" Show host Savannah Guthrie, has a new development after federal investigators questioned employees at a Tucson cafe featured in the "Today" show segment.

The 84-year-old mother accompanied her daughter on a sentimental tour of Tucson and the locations she frequented as a child, including the Mexican restaurant.

According to multiple reports, FBI agents visited El Charro Cafe in Tucson to interview staff about the time Nancy Guthrie filmed the segment with her daughter, Savannah Guthrie, for the Today show.

The FBI's inquiries at the restaurant focused on whether staff noticed unusual activity during the shooting of the segmen...