Driving south on audubon road in chaska on 30th of wednesday, 2017 (today)about 1 mile south of chanhassen high school i spotted a strange formation in the sky that i found odd. they were in the air ssw of me at about a 30 degree to 45 degree angle in the air, just above the treeline for observation. i do not know their altitude or distance from me but they appeared to have been over the minnesota river at least 3 miles or so away. i have worked in the past for an airlines and a major airport as well as air shows so i have seen many different aircraft in the air and in formations. this formation, and the objects just did not look quite normal. i first spotted them around 14:12. the sky was partly cloudy and the object were well below any cloud cover there may be. at first i thought that it might be a two aircraft but the the flight movement just did not look quite correct and as they moved i notice what could be a larger aircraft was four object in a row. i was just about to blow it off as a group of birds, maybe geese when i noticed that the formation is not one birds, or even aircraft fly in. it looked like this: * * * /\ * || direction of flight || * the formation did change to where the one off object switched sides mirroring the original formation. they appeared to make some odd movement to the right then one by one they pulsed a white light flash then appeared to disappear. these objects as stated were well below any cloud cover. the best description i can give of these 5 objects are that they were black orbs that appeared to have maybe 2 antenna(?) like objects protruding from on top, like this: \ / o but much shorter than the attempt of an image i tried to do. the sighting lasted about 2 minutes to 3 at most. the flash flair and disappearance happened when i was just south of pioneer trail and audubon road. there were no other objects in the sky that i could observe, aircraft or fowl. i was looking around to see if there were any other objects but the sky was clear except the objects i was witnessing to. i am a skeptic when it comes to alien encounter stories, but am open minded enough to know that there are strange things in the universe. how i feel about this after? i want to know if anyone else saw this. these objects reminded me of the stories of the phoenix lights, russian lights and other encounters people have seen like those, except these were dark orbs only flashing a light before they disappeared. please, if any others saw this i would like to know.