Tinley Park triangular red lights

Record summary

What happened Large numbers of residents photographed and filmed three red lights forming a triangle over Tinley Park and nearby suburbs, including on Halloween. The lights drifted and changed apparent geometry while remaining individually unresolved. Evidence Mass witnesses and multiple videos from different locations document the light formation. Explanations considered Illuminated balloons, lanterns or flares carried by wind can maintain a loose triangle and account for slow drift. What remains uncertain Images show lights rather than a solid triangular surface, and no recovered source or reliable range fixes their size. Primary source Tinley Park triangular red lights — Wikipedia