1 detained for questioning in Nancy Guthrie's abduction: 'Significant development'

A person has been detained for questioning in connection with the abduction of the mother of “Today” show co-host Savannah Guthrie, according to a law enforcement official briefed on the investigation.

The Pima County Sheriff’s Department, with assistance from the FBI, detained the person south of Tucson, the source told ABC News. The individual is being held for questioning as investigators continue to pursue multiple leads in the case.

Law enforcement officials are preparing to search a location associated with the detained individual, the source added. The investigation remains active, with law enforcement continuing to search the neighborhood of 84-year-old Nancy Guthrie.

No one has been charged in connection with the abduction. The newest revelation was described as a "very significant development" by CNN law enforcement analyst John Miller. He noted it was the first time in the investigation that an individual had been questioned since the Feb. 1 abduction.

Miller emphasized, however, that it was "too early to tell where this is going."