New Delhi, Feb. 5 -- Investigators probing the disappearance of Nancy Guthrie, the mother of NBC Today co-host Savannah Guthrie, have not identified any suspect or person of interest, Arizona authorities said on Wednesday (February 4), pushing back against speculation surrounding the case.

The Pima County Sheriff's Department said the investigation remains active and warned the public against spreading unverified claims.

"No suspect or person of interest identified at this time," the sheriff's department said in a social media update.

As rumours circulated on social media about possible suspects, investigators issued a strong caution.

"Detectives continue to speak with anyone who may have had contact with Mrs. Guthrie," the Pima Count...