India, Feb. 9 -- Authorities investigating the case of Savannah Guthrie's mother, Nancy, conducted a search of a septic tank located behind her residence on Sunday. Drone footage captured them as they opened a manhole cover in the backyard.

Three detectives were pictured inserting a long pole into the manhole situated behind the house. However, no additional details have been disclosed regarding their search objectives, according to NY POST.

The investigators departed without any findings. The reasons behind their decision to inspect the septic tank remain unclear.

This development comes as law enforcement reiterated that they have not identified any suspects or persons of interest in this case.

The 84-year-old woman was last seen mor...