UFO Sighting in Woodbury, Minnesota on 2017-06-27 13:30:00 - Fighter jets chasing something

i was working at the time i'm united states postal service mail carrier . what made me notice something was the sound of fighter jets in the sky . there were at least three maybe buy up to five fighter jets in the sky i only actually witnessed one but there seem to be something in front of it that was chasing him to do the loop to loop in the sky chasing this object . my feelings were that of a little bit of excitement and amazement, concern. they all flew off over the site line.