New Delhi, Feb. 2 -- Nancy Guthrie, 84-year-old mother of TODAY show anchor Savannah Guthrie, has been reported missing from her home in Arizona, prompting an intensive search operation and a parallel investigation by homicide detectives, authorities said late Sunday.

The Pima County Sheriff's Office (PCSO) said it received a 911 call around noon local time on February 1 reporting Guthrie missing from her residence in the Catalina Foothills area, north of Tucson.

Nancy Guthrie is best known publicly as the mother of NBC News journalist and TODAY co-anchor Savannah Guthrie. While she has largely remained out of the public spotlight, she has occasionally been referenced by her daughter in interviews and on-air conversations about family a...