Two disk-shaped craft hovering over city night , forms defined by red, successive lights illuminating edges, suddenly shoot skyward

As I was driving west on 30th St. Indpls. west side, I turned off the major 2-lane thouroughfare onto a winding residential street. I glances up and saw red blinking lights lighting in succession, with the two circular, disk-shaped crafts being defined by the red lights. I  stopped the car and pulled to the curb to try to make sense of the phenomenon, when both crafts, hovering together at about 500-800 ft., suddenly went vertical, maybe somewhat angled away, and quickly disappeared into the night sky.I heard no sounds.
Date may be approximate, although the witness does not indicate that fact.  PD