United Kingdom, May 11 -- Savannah Guthrie will "never stop looking" for her missing mom Nancy.

The Today show presenter's 84-year-old mother Nancy Guthrie disappeared from her Arizona home on February 1 and police have been treating her disappearance as a kidnapping. Savannah has previously admitted she believes Nancy is no longer alive but she is adamant she won't give up the search until she is able to bring her mother home.

In a post on Instagram to mark Mother's Day in the US, Savannah wrote: "We will never stop looking for you. We will never be at peace until we find you.

"We need help. Someone knows something that can make the difference. Call 1800CALLFBI. You can be anonymous, and the reward remains available. Please keep prayi...