Witnesses described seeing three to four lights appear and begin traveling from north to south, and many called local station KTVK to report what they saw. The Maricopa County Sheriff’s Office, however, stated that they did not receive any calls about the lights.
— Todd (@tater_todd55) October 26, 2016
Residents who called another local station reported seeing lights above Glendale, Gilbert, Queen Creek and other East Valley cities.
— Todd (@tater_todd55) October 26, 2016
Nearby Luke Air Force Base stated that they did not have any aircraft flying after 5:30 PM, and that they were not the source.
Witnesses tweeted videos at the National Oceanic and Atmospheric Administration, who stated that "it is not known what may have caused them to occur."
In June, a massive asteroid zoomed over Arizona skies, and entered the Earth’s atmosphere east of the Arizona town of Payson.
"There are no reports of any damage or injuries — just a lot of light and few sonic booms," Bill Cooke, the head of NASA's Meteoroid Environment Office at the Marshall Space Flight Center said in a statement at the time. "If Doppler radar is any indication, there are almost certainly meteorites scattered on the ground north of Tucson."
That meteor was estimated to be approximately 10 feet in diameter and travelling at roughly 42,000 mph.