Search for Savannah Guthrie's mother: What are the latest developments

Savannah Guthrie visited the 'Today' show studios amid the search for her missing mother Nancy Guthrie. Here's where the investigations is at.

As the search for Savannah Guthrie's missing mother nears its sixth week, law enforcement remains mobilized, seeking a breakthrough in the case while pursuing thousands of leads.

In a March 2 interview with NBC News, Pima County Sheriff Chris Nanos said he remained hopeful that Nancy Guthrie was still alive despite not having been seen. "I think the investigators are definitely closer," he said.

The sheriff's department continues to work with the FBI on the case, Nanos added.

Savannah Guthrie visited the "Today" show studios amid her ongoing hosting hiatus, a "Today" spokesperson confirmed on March 5. She plans to resume her duties as co-host of the NBC morning show, though a timeline was not provided.

Here's where the investigation into Nancy Guthrie's disappearance stands as the search nears its sixth week.