Last night they were spotted around the Columbus area (Genoa, Ulysses, and Octavia as well). I first tried scanning for any frequencies in search, but was unsuccessful. It may be pure speculation, but the ground unit(s) could be communicating via VOIP or other forms of communication that my not appear on our scanners.
It is really interesting to listen to the LE agencies track these reports. Three were spotted hovering by Genoa and then headed east (according to Nance County SO). They also spotted 3 near Ulysses at approximately 9:30pm. Butler County SO tracked them all the way to Octavia about 50 minutes later which is when the deputy reported seeing 4 or 5.
What would be interesting is if someone created a map of drone sightings with dates and times.