New Delhi, Feb. 4 -- The search for Nancy Guthrie, the 84-year-old mother of 'Today' show co-host Savannah Guthrie has intensified, with police reportedly investigating the host's brother-in-law as a potential suspect in the case.

On Tuesday, 3 February, former NewsNation host Ashleigh Banfield claimed that the NBC anchor's brother-in-law, Tommaso Cioni, has been identified as a person of interest, mentioned OK! magazine.

Nancy Guthrie was last seen around 9:30 pm on Saturday, 31 January, after being dropped home by a family member. When she failed to attend church Sunday morning, another churchgoer alerted the family, prompting a welfare check and a 911 call around noon.

Banfield said that investigators are examining a possible link b...