Mysterious drones have been flying over Colorado and Nebraska in recent weeks.<br />Authorities are perplexed by the aircraft and their origins.<br />Deputies have spotted more than 16 unmanned drones flying in northeast Colorado.<br />According to CNN, authorities received multiple reports of drone sightings last month.<br />FAA officials said that multiple FAA divisions and government agencies are investigating.<br />Officials said it appears the drones were staying at least 150-200 feet away from buildings and people.<br />The Yuma County Sheriff confirmed that the drones are flying in airspace controlled by the federal government.
