The sparse expanses of Northeast Colorado have become ground zero for a bizarre mystery surrounding sightings of nighttime coordinated flights of groups of drones. From roughly 7 pm to 10 pm every night last week, an estimated 17 drones with six-foot spans have flown "grid patterns" over Phillips County and near its border with neighboring Yuma County, according to Phillips County Sheriff Thomas Elliott. The drones operate at a few hundred feet in the air and were brightly lit with strobing colored and white lights, leaving local residents and those driving through the area baffled.

The Denver Post was first to report on the string of strange sightings. Local law enforcement, the FAA, DEA, U.S. Army, and the Air Force have said they have no idea what these aircraft are or who they belong to.