We saw two green flashing lights hovering, free fall, and disappear only to quickly reappear in a different spot a few seconds later

Two green lights close together just hovering over downtown Minneapolis. Then they free fell down until they stopped again and just stayed stationary over the city. Then it tilted sideways as it sped across to a different building and then came to a silent halt. It then turned around and we could faintly see the green lights blinking like they were traveling away and then they disappeared again. Then they came back over a different building and came closer to ours and hovered above the building right across from where our window is and they just hovered for a while before taking off across to the other side of the city where we saw it hover for a min then just disappear. Last we saw an hour ago was the two green lights then coming on and tilting again as it took off out of the city and headed south of Minneapolis!