Blood found on the front steps of Savannah Guthrie’s mom’s home belongs to the missing 84-year-old grandmother, police confirmed in a shocking update.

DNA samples were taken from the blood — seen in hair-raising footage from outside Nancy Guthrie’s million-dollar Tucson house. 

After the expedited analysis, it was determined to belong to Nancy, Pima County Sheriff Chris Nanos said at a Thursday press conference.

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“We rushed what we thought was the best target for DNA, we did a rush through, and got some of that back,” Nanos said. “The blood on the porch, that was one we did, it came back to Nancy. That’s what we know.”

That DNA was just one of several forensic samples police took from Nancy’s home and submitted for expedited analysis through the FBI labs – but so far, only analysis of the porch blood has been completed, according to police.

“There’s still more items that have been submitted, we just haven’t got them back,” Nanos said.

Nancy – mother of “Today” show host Savannah – hasn’t been seen since Saturday night when her son-in-law dropped her at home after a dinner with her daughter.

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

So far, police have identified no suspects.

But the FBI has been pouring its extensive resources into the investigation to help expedite everything from DNA and digital forensics to warrants and searches across the country.

“The FBI has committed a very large number of men and women to work side by side with us,” Nanos said. “We’re sharing all the information, all the data we have, to get this thing solved.”

“Right now we believe Nancy is still out there. We want her home,” he added. “And we just want her home, and find a way to get to the bottom of all of this.”