Nancy Guthrie’s pacemaker stopped syncing with her Apple devices predawn Sunday, a report said Tuesday — as Arizona cops leading the case hastily called a press conference.

The implanted medical device lost contact with the apple products belonging to NBC News star Savannah Guthrie’s 84-year-old mom around 2 a.m., a law enforcement source told Fox News.

When authorities reached her Arizona home hours later around noon, Nancy’s phone and Apple Watch were still inside the house, the source said.

Savannah Guthrie and mother Nancy Guthrie

Savannah Guthrie and her mother, Nancy Guthrie.
Nathan Congleton/NBC via Getty Images
The disturbing revelations come as Pima County Sheriff Chris Nanos said on MS Now that the ongoing search is becoming more investigative.

“The air and ground searches … you’ll see that slow down,” he said Tuesday morning. “Those things are going to slow down, we’re pushing more to the investigative side of this.”

The top cop said more DNA and video footage evidence is expected to come in.

“She is an 84-year-old woman who went to bed and sometime in the middle of the night she was removed from that home and now here 48 plus hours and this lady needs her medication,” he said. “So it’s not good.”

The Pima County Sheriff’s Office is expected to address reporters around 11:30 a.m. local time to provide an update after previously telling The Post just hours earlier there were no media appearances planned for Tuesday.

Law enforcement previously said officials believe Nancy was possibly kidnapped or abducted from her home.

 

The scene of the house on Fe. 2, 2026.

The scene around the house on Feb. 2, 2026.
Rebecca Noble for NY PostNancy Guthrie's house in Tucson, Arizona.

Nancy Guthrie’s house in Tucson, Arizona.
Rebecca Noble for the NY Post
Sources told The Post blood and signs of forced entry were found inside her house in the aftermath of the disappearance.

Savannah, the co-host of “Today” has asked fans for their prayers as the family holds out hope.

“Thank you for lifting your prayers with ours for our beloved mom, our dearest Nancy, a woman of deep conviction, a good and faithful servant,” she wrote in an Instagram post Monday night.“Raise your prayers with us and believe with us that she will be lifted by them in this very moment.”