New Delhi, Feb. 10 -- More than a week after she disappeared, Nancy Guthrie, the mother of Today show anchor Savannah Guthrie, is still untraceable. The 84-year-old went missing from her home in Tucson, Arizona, prompting her family to alert authorities. Nancy was reported missing on Sunday, February 1, after she did not turn up for her regular morning church service, something her family said was very unlike her.

The evening before she vanished, Nancy spent time with her daughter Annie Guthrie and Annie's husband, Tommaso Cioni. The family had dinner together before Nancy returned home later that night.

Investigators believe Nancy was taken sometime between late Saturday night and early Sunday morning.

Police found signs of a struggle...