A neighbor of missing Arizona grandmother Nancy Guthrie reported seeing a mysterious white van in their neighborhood just days before the 84-year-old vanished.

Brett McIntire, 72, who lives directly across the street from Nancy in the Catalina Foothills area, informed police about the sighting, according to the New York Post. However, McIntire couldn’t pinpoint the exact day he noticed the van.

“It was parked somewhere on that street. It was a full-sized white van without any markings,” McIntire explained. “Usually, if someone is coming to work on your home, they have a company vehicle or some kind of identification on it.”

He added, “From now on, I’ll make sure to carry a pen and paper to note anything unusual I see.”

Nancy Guthrie, the mother of “Today” show host Savannah Guthrie, was last known to be in her home shortly before 10 p.m. on January 31, as reported by CrimeOnline. Her family reported her missing around noon on February 1, after she failed to attend church.

“We are indeed dealing with a crime,” stated Pima County Sheriff Chris Nanos on Monday.

Investigators later found blood on her front porch, confirmed to be Nancy’s. Officials said that around 1:47 a.m. on February 1, Nancy’s doorbell camera had been disconnected. At 2 a.m., Nancy’s pacemaker pinged her phone.

At around 2:12 a.m., security camera software detected movement, Nanos said, although he could not confirm where the movement came from.

“We know there’s something going on in that house, regardless of what law enforcement is willing to say,” “Crime Stories’ reporter Dave Mack told Nancy Grace.

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On Wednesday, Nanos stated he believes Nancy Guthrie is still alive, although he admitted that “we have nothing else to go on but the belief that she is here.”

So far, no suspects or persons of interest have been named.

The FBI said a $50,000 reward is being offered for information that leads to Nancy Guthrie.

Anyone with information is urged to contact the FBI tip line at 1-800-CALL-FBI (1-800-225-5324). Tipsters can also contact the Pima County Sheriff’s Department tip line at 520-351-4900.

[Feature Photo: Savannah and Nancy Guthrie/Instagram]