"Today" show co-host Savannah Guthrie's mother has been missing since overnight on Jan. 31. Here are latest updates on Nancy Guthrie's disappearance.

Nancy Guthrie was taken from her home early Sunday, authorities said.

Over 500 people attended a community candlelight vigil to pray for Savannah Guthrie’s missing mom, Nancy Guthrie, at a church in Tucson, Arizona, on Wednesday 4. Locals gathered at St. Philip's in the Hills Episcopal Church to show their support for the Today show cohost’s mother,

Hundreds gathered at a Tucson church for a vigil, praying for the safe return of Nancy Guthrie, mother of "Today" show cohost Savannah Guthrie.

Investigators searching for Nancy Guthrie have encountered several key challenges in the days since the 84-year-old mother of “Today” anchor Savannah Guthrie went missing, suspected of being taken from her home.

There has been no public sign of a response to NBC "Today" show host Savannah Guthrie's message to her 84-year-old mother's kidnapper.

Police in Arizona believe Nancy Guthrie, 84, was taken by force from her Tucson area home this weekend. So far, no suspect or person of interest has been identified.

Police believe Nancy was abducted from her home against her will. She was last seen at around 9:30 p.m. Saturday at her home near East Skyline Drive and North Campbell Avenue in Tucson, and reported missing around midday on Sunday after she failed to attend church.