Saw at least 15 orange/yellow ball of light (may be more) formed together moving horizontally

I am an nightshift worker that oversees the water for south mountain area of Phoenix and I happen to take an break in an dark area that is also elevated enough to oversee phoenix. I parked company vehicle facing north east and just happen to see an bunch of orange/yellow ball lights, kind of in an string but not that in line, more like an cluster, moving together quickly from what looks to be north to south at least. They look to be hovering low judging how far they’re from the ground, at least slightly above downtown Phoenix skyscraper elevation. I am unsure if it was moving above city or in the mountains and only lasted 2-3 seconds before disappearing quickly. Also the direction I looked at based on my location, I am also looking in path of airport and looks to be military base as well. Since then I haven’t seen an video or report about it.