A parking ban is set to go into effect Thursday for several streets in the area surrounding Nancy Guthrie's Tucson, Arizona, home, the Pima County Sheriff's Department announced Wednesday afternoon.

The no parking zone in the missing 84-year-old's neighborhood is meant to "protect public safety and relieve area residents from chaotic conditions caused by a large media and social media streamer presence in the area," a notice on the county's website says.

Earlier Wednesday, the FBI spent several hours in and out of Guthrie's million-dollar house at Catalina Foothills Estates. In a sign that the investigation into her disappearance is at a standstill, feds were there to do one last sweep for evidence before deciding whether family can return to the property, sources told The Post.

The FBI spent several hours at Nancy Guthrie’s Arizona home on Wednesday, conducting one more sweep for evidence before deciding whether her family can return to the property, sources told The Post.

The development signals that the investigation into the 84-year-old’s abduction is at a standstill as she’s now been missing for 25 days and authorities have yet to identify any suspects in the baffling case.

The timeline of the disappearance of Savannah Guthrie's mom:

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The feds arrived at Guthrie’s Tucson house on Wednesday morning, spending more than two hours at the million-dollar property.

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TUCSON, Ariz. — Officials left Nancy Guthrie's home just now after two-plus hours of investigation.

It's unclear who the authorities are or what they were doing at the missing 84-year-old's house. About 10 apparent investigators were on the scene, looking around outside and then going inside.

One of the men was wearing an FBI polo shirt.

TUCSON, Ariz. — There's a flurry of official-looking activity outside the home of Nancy Guthrie, "Today" co-host Savannah Guthrie's mother, who has been missing since Feb. 1.

Two men in suits arrived at the missing woman's Tucson, Arizona, house Wednesday morning. The sheriff posted outside the house let them park. They were joined by what appeared to be a tradesman in a work truck, who arrived separately, pictures show.

After the tradesman helped the two men enter the Guthrie home, he and one of the officials drove off separately, The Post witnessed.

The official who left returned with a woman in a suit, and the two went back into the house.

About 15 minutes later, three black SUVs pulled onto the Guthrie property and six people — five with suits, one man wearing casual clothes — got out and entered the house.

It is unclear in what capacity they are there.

One of Nancy Guthrie's neighbors has claimed she saw a suspicious young man walking around the neighborhood several weeks before the 84-year-old went missing.

"He didn’t have your typical walking gear on, and he had his hat pulled really far over his eyes," Aldine Meister, who lives in Catalina Foothills, along with "Today" show host Savannah Guthrie's mother, told Fox News Digital Wednesday.

Meister saw the unknown man walking close to an intersection leading to Nancy's home, and hadn't seen him before or since, she said.

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Two landscapers on Tuesday nailed eight "No Trespassing" signs around Nancy Guthrie's property where she went missing.

“Today” show host Savannah Guthrie had wanted to offer a $1 million reward for her mom’s safe return on the day she went missing, but investigators shot down the idea, according to inside sources.

An emotional Savannah finally announced a million-dollar family reward for information about Nancy Guthrie’s whereabouts on Tuesday — more than three weeks after the 84-year-old was abducted from her home near Tucson, Arizona.

She had wanted to offer the million on day one, but “all involved in the Investigation” feared it would result in a deluge of bogus tips when investigators already had thousands of tips coming in organically, according to the source.

The FBI had already doubled the reward for information leading to Guthrie from $50,000 to $100,000 as embattled authorities hit one dead end after another.

The Guthrie family has fully cooperated with law enforcement from the start, according to the sheriff’s department — which apparently means letting authorities make the call about the size and nature of the reward.

The $1 million family payout is for information leading to Guthrie’s return only, and doesn’t hinge on an arrest or prosecution.

That said, it carries the same conditions as the FBI payout and will only be paid if the FBI also pays. It also could be split among multiple claimants if more than one person has a valid claim.

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The masked man who is suspected in Nancy Guthrie’s abduction may have approached her Tucson property before the morning she was snatched from her home, according to reports.

Sources close to the investigation told ABC News and NewsNation that they believe the masked intruder, featured in home surveillance video released by the FBI, went to Guthrie’s home sometime before she was taken on Feb. 1.

The sources pointed to a piece of the home security footage that shows the suspect at Guthrie’s front door — without a backpack in a still image released by the FBI.

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Amid the frantic search for her mother, Savannah Guthrie’s husband, Mike Feldman, quietly paid a visit to “Today” to show her colleagues their appreciation for the outpouring of support.

We’re told that since Nancy Guthrie went missing from her home nearly a month ago, Savannah’s family has been blown away by the love from her colleagues at NBC.

“From the top of the company to the bottom – it’s gone beyond just a workplace,” a source close to Savannah told Page Six.

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"Today" show co-host Savannah Guthrie released a gut-wrenching video early Tuesday begging the public for help to find her missing mother and saying the family still believes a miracle is possible.

"We still believe in a miracle. We still believe that she can come home," Guthrie said in a short video.

"We also know she may be lost. She may already be gone. She may have already gone home to the Lord that she loves and is dancing in heaven with her mom and her dad and with her beloved brother."

Savannah announced a $1,000,000 reward for information on her mother, who has been missing for 24 days.

"Every hour, minute, second has been agony," Savannah said as she asked for continued prayers for her family.