DEVELOPING: A full-sized white van with no markings was reportedly parked on Nancy Guthrie’s street shortly before she vanished, according to a neighbor who noticed it didn’t belong.

Neighbors of Nancy Guthrie reported spotting a suspicious white van parked on their street in the days before the 84-year-old vanished.

Guthrie’s neighbor, Brett McIntire, told The Post on Thursday that he reported seeing the unmarked van to the police, who asked him basic questions about what he observed in the days leading up to the disappearance of Savannah Guthrie’s 84-year-old mother.

“It was somewhere on that street. It was a white van, full-sized, with no printing on the sides. It was parked on the street,” said McIntire, who lives across from Nancy.

Savannah Guthrie’s mom Nancy vanished on Saturday night.

Nancy Guthrie’s home in Tuscon, Arizona.

“Normally people that are coming to work on your home will have a company vehicle or if they’re independent something written on it,” the 72-year-old added.

“From now on when I’m going out and about I’ll have a paper and pen and record anything unusual.”

His wife, Lisa McIntire, said they are now considering getting security cameras despite having a “pretty secure residence.”

“Brett and I were talking. And we thought well, we should probably get one.”

“We’ve have a pretty secure residence. Metal doors. I’m kind of a deep sleeper, so it’s unlikely someone could get past one of the metal doors. But we’re a little concerned.”

The McIntires couldn’t recall the exact day they spotted the van, but Brett said he reported it to police.

The Post reached out to the Pima County Sheriff’s Department.

Neighbors of Nancy Guthrie reported spotting a suspicious white van parked on their street in the days before the 84-year-old vanished.

Guthrie’s neighbor, Brett McIntire, told The Post on Thursday that he reported seeing the unmarked van to the police, who asked him basic questions about what he observed in the days leading up to the disappearance of Savannah Guthrie’s 84-year-old mother.

“It was somewhere on that street. It was a white van, full-sized, with no printing on the sides. It was parked on the street,” said McIntire, who lives across the street from Nancy.

“Normally people that are coming to work on your home will have a company vehicle or if they’re independent something written on it,” the 72-year-old added.

“From now on when I’m going out and about I’ll have a paper and pen and record anything unusual.”

His wife, Lisa McIntire, said they are now considering getting security cameras despite having a “pretty secure residence.”

“Brett and I were talking. And we thought well, we should probably get one.”

“We’ve have a pretty secure residence. Metal doors. I’m kind of a deep sleeper, so it’s unlikely someone could get past one of the metal doors. But we’re a little concerned.”

The McIntires couldn’t recall the exact day they spotted the van, but Brett said he reported it to police.

The Post reached out to the Pima County Sheriff’s Department.

Guthrie was reported missing on Sunday, and the investigation was declared a criminal probe on Monday.

Police said at a press conference on Thursday afternoon that they believed Nancy was “still out there” and hoped to get her home as soon as possible.

A ransom note sent to local and national news outlets did not include any proof of life nor a way for law enforcement or her family to communicate with the sender.

Savannah and her two siblings issue a video statement on Wednesday, pleading with their mom’s possible abductor for her safe return.

“We need to know, without a doubt, that she is alive, and that you have her. We want to hear from you, and we are ready to listen. Please, reach out to us,” Savannah said in an appeal.

So far, police have identified no suspects.