Police have provided an update on the search for the 84-year-old suspected kidnap victim.

Savannah Guthrie has made an emotional return to her missing mother Nancy’s home in Arizona, where police believe the 84-year-old was kidnapped a month ago.

The US Today show host was seen embracing her sister and brother-in-law and laying down yellow flowers at the property on Tuesday, local time.

Later, Guthrie posted a photo of the growing floral tributes to Instagram with the caption “bring her home”.

Meanwhile, local investigators say they are “definitely closer” to finding Nancy.

The 84-year-old’s disappearance has now entered its second month, with police continuing to treat the case as a suspected kidnapping.

Nancy was reported missing on February 1 when she did not show up to a friend’s home in Tucson, Arizona, to watch a livestreamed church service.

Savannah Guthrie has made an emotional return to her mother’s home. Credit: 7NEWS

Authorities said they’ve made progress in the case after receiving a barrage of tip-offs from the public following Guthrie’s announcement of a $US1 million reward for the recovery of her mother.

The reward does not hinge on an arrest or prosecution, only Nancy’s recovery, and the $1 million can be split if there is more than one valid claim.

In the video, a visibly emotional Guthrie urged the public to keep her mother in their thoughts.

“Please keep praying without ceasing,” she said.

“We still believe. We still believe in a miracle.

“We still believe she can come home — ‘hope against hope’, as my sister says.

“We are blowing on the embers of hope.

“We also know that she may be lost. She may already be gone.”

The Guthrie family also plans to donate $500,000 to the National Centre for Missing And Exploited Children.