The two I saw at fairly close range appeared to be silent solid airborne objects performing maneuvers that neither plane, nor helicopter, nor drone could.
How do you know they were solid? they can probably do a lot of stuff with lasers now that we don’t even know about.
I saw something similar a number of years ago, looked like a giant green orb less than a mile away that did maneuvers that appeared impossible for any known aircraft. There was no one with a laser nearby as I was camping 10 miles back in the wilderness and the orb came up out of a very steep canyon.