© MUFON databaseWitness photo from April 1, 2009.
Four Illinois witnesses in two vehicles chased a UFO April 1, after first spotting it near Frankfort Square about 8 p.m., according to a report filed with the Mutual UFO Network (MUFON) database.
The chase ended for two of the witnesses near Merriville, Indiana, at about 9:30 p.m.
They described the object as a "large triangular object in the sky."
"There were three lights on the object on each point and they appeared to be changing colors from red and blue constantly," according to one witness. "The lights were far enough in the distance that the shape was not clearly visible but when the lights moved, they stayed the same brightness and appeared to be equidistant from each other. The object appeared at times to be pointing downward and then it would appear to turn and be pointing up or to the side."