Local Arizona officials were delayed in accepting help from federal investigators in the search for Nancy Guthrie — letting critical days in the investigation pass before bringing them into the fold, according to a report. 

Law enforcement sources told Fox News Digital that local Pima County authorities did not immediately cooperate with federal investigators amid the search for the 84-year-old mother of “Today” show host Savannah Guthrie. 

The Pima County Sheriff’s Department has said that the FBI is currently handling all aspects of the investigation related to ransom notes or communications with the Guthrie family.

Nancy Guthrie’s disappearance has now moved into its ninth day with no suspects.

The Pima County Sheriff’s Department did not immediately respond to The Post’s request for comment. 

No suspects have been identified in Nancy Guthrie's disappearance as of Monday evening — even after the supposed ransomers’ final deadline passed at 7 p.m. EST.

“We do not have any additional information to release publicly this afternoon,” the Pima County Sheriff’s Department said in its daily update sent out just before the deadline.

“We understand the significant public interest in this case; however, investigators need time and space to do their work,” the department said.

“If and when relevant information becomes available, it will be shared.”

The FBI would also handle anything having to do with ransoms, the sheriff’s department added.

“For more than a week, FBI agents, analysts, and professional staff have worked around the clock to reunite Nancy Guthrie with her family. The FBI is not aware of any continued communication between the Guthrie family and suspected kidnappers, nor have we identified a suspect or person of interest in this case at this time," the bureau said, according to AzFamily.com crime reporter Briana Whitney.

"Additional personnel from FBI field offices across the nation continue to deploy to Tucson. We are currently operating a 24-hour command post that includes crisis management experts, analytic support, and investigative teams. But we still need the public's help," the FBI added,

"Someone has that one piece of information that can help us bring Nancy home. We need that person to share what they know. Please call us at 1-800-CALL-FBI.”

The doomsday 7 p.m. ET deadline for Nancy Guthrie’s family to cough up $6 million to the villains who claim to be holding her came and went Monday — as TV star daughter Savannah issued a desperate new plea for help.

“We are at an hour of desperation,” the “Today” show star said in an Instagram video Monday afternoon — just three hours before the deadline that her 84-year-old mother Nancy’s purported kidnappers set in a ransom note after she vanished from her Arizona home more than a week ago.

The daunting deadline passed with no sign of the ransom being paid or proof that the ailing grandmother was still alive — leaving her fate in question.

The bitcoin account given by kidnappers showed zero balance and zero transactions.

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TUCSON, Ariz. — Savannah Guthrie fans and neighbors have flooded her late father’s virtual gravesite and her mother's home with prayers and well-wishes as the 84-year-old's disappearance has extended to a ninth day.

The Post observed ornate signs reading “Please pray, bring her home,” and “Dear Guthrie family, your neighbors stand with you,” posted by the mailbox of Nancy Guthrie's Catalina Foothills home. 

A group of women was also spotted holding hands and praying outside Nancy's home on Monday, Fox News reporter Michael Ruiz posted on X. 

An online memorial site for Savannah’s late father, Charles Errol Guthrie, who died in June 1988 while on a mining exploration project in Mexico, was filled with more prayers. 

“You are not forgotten.... give Nancy strength at this difficult time or welcome her to you!!” an anonymous post from Saturday eerily read on Charles’s Findagrave.com memorial. 

Old photos of the late Guthrie and his daughter, Savannah, were also recently posted to the site.

Savannah Guthrie’s most recent plea for the public’s help in finding her mother, Nancy, showed several signs of strength and defiance, according to a retired FBI agent. 

"We are at an hour of desperation," Savannah said in the video posted to Instagram on Monday afternoon.

“We believe our mom is still out there,” she said. “She was taken and we don't know where.”

The "Today" show host appeared alone -- and was wearing makeup and jewelry during the clip, signaling her strength, former FBI agent Jennifer Coffindaffer posted to X. 

Savannah also spoke much about prayer, showing well-wishes have boosted her spirits, and did not address the “despicable ransom note terrorists,” Coffindaffer added. 

She continued the plea by asking the public for help, suggesting that cops still need tips from the public to help find Nancy Guthrie more than a week after she was abducted. 

Savannah also spoke fondly of her brother and sister and signaled that her 84-year-old mother could be anywhere — begging anyone, no matter where they live, to see or report anything suspicious. 

“I’m coming on just to ask you not just for your prayers, but no matter where you are, even if you’re far from Tucson, if you see anything, if you hear anything at all that seems strange to you, that you report it to law enforcement," Savannah recounted in the video.

A former Arizona SWAT commander revealed to The Post on Monday what cops hunting for Nancy Guthrie will now be doing as the evening's deadline for a $6 million bitcoin ransom fast approaches and the case continues to baffle authorities.

Ex-Pima County Sheriff's Department SWAT Cmdr. Bob Krygier said his former colleagues will be frantically going over their former leads as they look to verify the supposed ransom notes and crack the case of TV star Savannah Guthrie's missing mom.

"They will be going back over a lot of their previous leads again, interviewing individuals again, checking all the cameras that we have on buildings, intersections, things like that," Krygier told The Post.

"I guarantee they're following up on every lead they're given," he said ahead of the second ransom deadline from Nancy's alleged kidnappers of 5 p.m. Arizona time, or 7 p.m. Eastern.

"As it relates to those time frames, as we get close, you get more and more concerned that the note is legitimate and [the abductee] is in danger and more concerned with how we can safely rescue them as opposed to how legitimate are the threats from the bad guys," Krygier said.

"It isn't like the old days when you would dump a bag of money at a certain place. Kidnappers have to give some information they actually have the victim, whether it's a photo, a video, a conversation," he said.

"On the tactical side, the cops are going to have a plan to track the kidnappers down. We're going to treat them as if the hostage is there. If they are lying [about having her], they are essentially facilitating a kidnapping," he said.

Krygier, who previously worked on the investigation into the attempted assassination of Arizona Rep. Gabby Giffords in 2011, also explained how crucial communications between the FBI and local law enforcement are.

"Local cops have much better knowledge of what's going on in the community, but that relationship with the FBI is hugely important, and that's probably how Nancy Guthrie's case is going to be solved," he said.

Savannah Guthrie on Monday issued a desperate new plea for help from the public as the supposed deadline to fork over millions of dollars for her mother's safe return loomed -- with the TV star saying her 84-year-old mom is "still out there.

"We are at an hour of desperation," Savannah said in the video posted to Instagram Monday afternoon.

“We believe our mom is still out there,” she said. “She was taken and we don't know where.”

Savannah begged anybody across the country -- not just in her mother's home state of Arizona -- to report anything suspicious they think may have to do with her mother's disappearance.

Savannah Guthrie and her siblings have moved in together at a $1.2 million mansion in the Arizona desert amid intense media scrutiny over the disappearance of their mother Nancy, a report said Monday.

Savannah, a "Today" TV show co-host, was initially staying with her sister Annie, 56, and brother-in-law Tommaso Cioni, 50, at their $675,000 house in the Catalina Foothills neighborhood above Tucson, near their mom's home.

But as law enforcement paid a second visit to the house over the weekend -- and press swarms the area -- the two sisters, along with their older brother Camron, 61, moved into a five-bedroom home nearby, the Daily Mail reported.

The siblings left for their new home in the middle of the night amid unrelenting cameras, according to reports.

The new, more private house features a guarded gatehouse preventing anyone but residents from entering and shielding the front door from the news crews on the streets.

Savannah Guthrie’s most recent message to mother Nancy’s supposed captors appeared to somberly shift in tone from the TV star’s first much more hopeful video just days earlier, a top NBC reporter acknowledged on her show Monday.

“I think it’s important to note what that video doesn’t say, as much as what it does say,” network law-enforcement reporter Tom Winter told the “Today” show -- as the alleged 7 p.m. EST ransom deadline for the 84-year-old grandma approached.

“That video doesn’t talk about any sort of deadline,” Winter said of Savannah's latest video. “There's no longer any discussion of that.

“There’s a discussion of bringing Nancy home to us so we can have celebration with her. There is no further request for proof of life,” he said.

Savannah and her sibling released the latest video to the supposed captors Saturday saying they were ready to pay their demands to get their mother back.

“We beg you now to return our mother to us, so that we can celebrate with her,” Savannah said in the heart video as she sat by her sister Annie and brother Camron. “This is the only way we will have peace. This is very valuable to us, and we will pay."

That latest video came after the supposed kidnappers allegedly sent a second note to a local TV station, although the missive's contents have not yet been revealed. In a first note sent to several media outlets, they demanded $6 million.

But unlike the Guthries’ first message sent in response to the reputed ransomers’ original note, the family's latest video did not request evidence that Nancy was safe.

“So when you look at this video, you say what was in the second note?'' Winter said. "I have not personally seen it, but it does appear there has been a shift here, at least a shift in messaging."

Law enforcement still have not confirmed whether the ransom notes – including the first, which demanded the $6 million in bitcoin by Monday in return for Nancy’s release – were real or scams.

A bitcoin account allegedly set up to receive the $6 million ransom demand for Nancy Guthrie is still empty, just hours before the kidnappers' reported deadline for the dough.

As of Monday afternoon, the balance in the publicly viewable account stands at $0 with no recorded transactions, TMZ reported.

It is unclear how long it typically takes for bitcoin accounts to update.

The alleged ransom note for the 84-year-old grandmother -- the daughter of TV morning star Savannah Guthrie -- had listed a deadline of Monday at 5 p.m. Arizona time, or 7 p.m. Eastern, to pay the $6 million ransom in cryptocurrency.

A previous deadline to hand over the ransom expired Thursday.

A camera that overlooked Nancy Guthrie's driveway at her Tucson, Ariz., home has been removed, according to a reporter on the ground.

"I'm not sure when this camera overlooking Nancy Guthrie’s driveway was removed, but it’s not there right now," Fox News Digital's Michael Ruiz wrote on X.

He also shared a picture purportedly showing where the camera had been removed.

Savannah Guthrie and her family are facing a terrifying, fast-approaching deadline to pay a $6 million ransom later Monday to fiends claiming to have the “Today” co-host’s missing 84-year-old mom, Nancy Guthrie.

The ransom note gave a deadline of 5 p.m. Arizona time (7 p.m. ET) to pay a bitcoin account or face serious consequences nine days after the family matriarch is assumed to have been snatched from her bed in her million-dollar Catalina Foothills home.

In her latest plea to those claiming to hold her mom, Savannah Guthrie said the family was ready to pay — but needed proof that their mom was still alive.

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